What YouGov's terms say
YouGov's terms of service and privacy policy have 27 rated points: 2 serious, 10 bad, 11 worth knowing and 4 good. 16 apply whenever you use the site, signed in or not; 11 only once you have an account.
Whenever you use YouGov
Serious 1
Sensitive data is collected and shared to target advertising
They use sensitive data for the same purposes as "typical" personal data, including to target advertising as shown in this point https://edit.tosdr.org/points/22614
Where it says this ↗
Bad 6
The court of law governing the terms is in a jurisdiction that is less friendly to user privacy protection
The court of law governing the terms is in a jurisdiction that is less friendly to user privacy protection (England)
England is part of the five eyes alliance aiming to share great amounts of data between the members.
Where it says this ↗Your personal data is used to employ targeted third-party advertising
Where it says this ↗This service shares your personal data with third parties that are not essential to its operation
This service shares your personal data with third parties that are not involved in its operation
These "partner organizations" include advertisers.
Where it says this ↗Information is gathered about you through third parties
Information is even bought.
Where it says this ↗Your data may be processed and stored anywhere in the world
Where it says this ↗Many different types of personal data are collected
Where it says this ↗
Worth knowing 7
There is a date of the last update of the agreements
There is a date of the last update of the agreements (Terms: May 2021)
Where it says this ↗The terms may be changed at any time, but you will receive notification of the changes
As no clear time is defined before the changes become effective after the notice, I think this case would be the more fitting.
Where it says this ↗The service assumes no liability for any damages the user incurs
This service assumes no liability for any losses or damages resulting from any matter relating to the service
Where it says this ↗Your personal data may be aggregated into statistics
Your personal data is aggregated into statistics
Where it says this ↗This service gives your personal data to third parties involved in its operation
Where it says this ↗Third parties are involved in operating the service
Where it says this ↗No guarantee is made reguarding the accuracy and/or reliability of the information provided
The service does not guarantee accuracy or reliability of the information provided
Created by Docbot version v3
Where it says this ↗
Good 2
Information is provided about what kind of personal information is collected
Details are provided about what kind of information they collect
Where it says this ↗Information is provided about how your personal data is used
Where it says this ↗
If you have a YouGov account
Serious 1
Specific content can be deleted without reason and may be removed without prior notice
Where it says this ↗
Bad 4
Your content can be licensed to third parties
Full quote: "With respect to all User Content you elect to transmit to us (including User Content you post on the Websites or Apps), you grant YouGov a royalty-free, perpetual, irrevocable, non-exclusive licence (with the right to sublicense) to use, reproduce, modify, adapt, edit, publish, translate, create derivative works from, exploit, perform and display such User Content (in whole or part) throughout the world and/or to incorporate it in other works in any form, media or technology now known or later developed, for any purposes."
Where it says this ↗A license is kept on user-generated content even after you close your account
Full quote: "With respect to all User Content you elect to transmit to us (including User Content you post on the Websites or Apps), you grant YouGov a royalty-free, perpetual, irrevocable, non-exclusive licence (with the right to sublicense) to use, reproduce, modify, adapt, edit, publish, translate, create derivative works from, exploit, perform and display such User Content (in whole or part) throughout the world and/or to incorporate it in other works in any form, media or technology now known or later developed, for any purposes."
Where it says this ↗Your provided identifiable information is actively checked by the service
Where it says this ↗Your account can be deleted or permanently suspended without prior notice and without a reason
Your account can be deleted without prior notice and without a reason
Where it says this ↗
Worth knowing 4
You must create an account to use this service
Where it says this ↗You agree not to submit libelous, harassing or threatening content
Where it says this ↗Your content can be distributed through any media known now or in the future
Full quote: "With respect to all User Content you elect to transmit to us (including User Content you post on the Websites or Apps), you grant YouGov a royalty-free, perpetual, irrevocable, non-exclusive licence (with the right to sublicense) to use, reproduce, modify, adapt, edit, publish, translate, create derivative works from, exploit, perform and display such User Content (in whole or part) throughout the world and/or to incorporate it in other works in any form, media or technology now known or later developed, for any purposes."
Where it says this ↗Your content can be deleted if you violate the terms
Where it says this ↗
Good 2
You have the right to leave this service at any time
Where it says this ↗The service has non-exclusive use of your content
Full quote: "With respect to all User Content you elect to transmit to us (including User Content you post on the Websites or Apps), you grant YouGov a royalty-free, perpetual, irrevocable, non-exclusive licence (with the right to sublicense) to use, reproduce, modify, adapt, edit, publish, translate, create derivative works from, exploit, perform and display such User Content (in whole or part) throughout the world and/or to incorporate it in other works in any form, media or technology now known or later developed, for any purposes"
Where it says this ↗
The documents
Ratings by ToS;DR volunteers; they can lag behind the current terms. Not legal advice.