Pre HF22 Hive and Steem are the same thing.

Here are the posts about the advertising campaign on Hive.

@jerrybanfield/h2jl7o95

@jerrybanfield/31098ac6-4894-11e8-b5f5-0242ac110002

@jerrybanfield/ec366f45-4312-11e8-9f5b-0242ac110002

A very large number of Hiveans have signed up for and support this class action.

If you want to opt-out you will have to opportunity to do so as the Court case progresses.