I just had a look at the claim form and it appears they are offering exactly what I recall them offering in the Welcome Back thing (just less of it). One game from the what appears to be the same list of games OR one from a list of themes OR three months of PS+. You get two bites of the cherry if you did not participate in the Wlecome Back thing.
Seems like an odd thing to have had to go through a class action for - less of the exact same thing non-suing entities (sorry, people) recieved.