Terms of service
The contract governing use of an online service — the EULA's counterpart for software you never actually receive a copy of.
Where an EULA licenses a copy of a program, terms of service govern a relationship: what you may do on the service, who owns what you upload and when your account can be closed. In the US, Specht v. Netscape (2002) held that a link at the bottom of a page — "browsewrap" — is not enough to show consent, which is why every signup form now carries a box reading "I have read and agree".
Nobody has read. A 2016 study had 543 students sign up for a fictitious social network whose terms signed away their firstborn child; 98 percent agreed. Since 2012 the "Terms of Service; Didn't Read" project has graded terms for those who can't face them. In the EU, consumer protection law and the GDPR limit what can be agreed to at all, however many boxes get ticked.