... which licenses its content with CC by SA 4.0[1] and has a public API.
Other licensing models of content will vary.
[1] https://meta.stackexchange.com/questions/333089/stack-exchan...
At least in the U.S., I don't think it's that relevant to the use-cases I've seen. IANAL, but in the 4-factor fair use test a place like Internet Archive rehosting the content to me easily clears 3 of them if the original host goes away.
So, it became a useless site because there were no teeth to the rules.
This is the source of the HUEHUEHUE meme https://knowyourmeme.com/memes/huahuehuahue . There's even an academic study on the Brazilian online cultural traits that cause such problems in Orkut! https://www.researchgate.net/publication/265844216_'HUEHUEHU...
GTalk was really in a position to be the #1 messenger.