What Gravatar's terms say
Gravatar's terms of service and privacy policy have 7 rated points: 0 serious, 3 bad, 2 worth knowing and 2 good. 4 apply whenever you use the site, signed in or not; 3 only once you have an account.
Whenever you use Gravatar
Bad 2
Third-party cookies are used for statistics
Google Analytics is used for statistics
Where it says this ↗You are tracked via web beacons, tracking pixels, browser fingerprinting, and/or device fingerprinting
Where it says this ↗
Good 2
A list of all cookies used by the service is provided
A list of all cookies set by the website is provided
Where it says this ↗The service is released as free software or open-source
The service is released as free software
If you have a Gravatar account
Bad 1
Tracking pixels are used in service-to-user communication
<p>Both websites and HTML emails may also contain other tracking technologies such as “web beacons” or “pixels.”
Where it says this ↗
Worth knowing 2
The posting of pornographic content is prohibited
Prohibits the posting of pornographic content
Where it says this ↗You agree not to submit libelous, harassing or threatening content
Users agree not to submit libelous, harassing or threatening content
Where it says this ↗
The documents
Ratings by ToS;DR volunteers; they can lag behind the current terms. Not legal advice.