Anticircumvention laws may or may not apply. I'm not sure. It certainly sounds like it does. The thing is I don't think those laws are very successful at preventing anything.

They didn't save the music records, movies and video games industries. They're still actively fighting against the user, an adversary that has all the power. DVD content was successfully decrypted despite the DMCA; ironically, genuine games are often inferior to their pirated counterparts. A site without ads has better usability and is more secure.

Even if sites say you can't access content already transmitted to your computer unless you view ads, they're not in a position to enforce that. A bunch of laws saying people can't circumvent their protection won't suddenly change that fact.