Edit:

I was able to find the class action court document:
https://www.courtlistener.com/docket/69225297/lakes-v-ubisoft-inc/

and what appears to be the link to join the class action:
INVESTIGATION ALERT: Levi & Korsinsky, LLP Investigates Ubisoft (EPA:UBI) Video Game Purchases

Levi & Korsinsky, LLP is investigating whether affected customers are entitled to compensation. If you made a purchase on the Ubisoft website, you may be entitled to compensation. There is no cost or obligation to participate. Follow the link below to find out:

https://zfrmz.com/c9mbGuGU3q4qBDKouYOU