All the time. I get various postcards and email from different companies that I have done business with in the past, and 95% of the time I sign up for the suit. Normally you have to swear that you bought something or did something in some interval of years to be a part of it.
Recently (like a couple months ago) there was something from Equifax where they had been hacked and they had to pay ‘restitution’ to those who were victims. They sent a check for $25 or so,
I don’t go seeking these out, but if I am informed of it, I’ll sign up. I think the smallest I have ever collected was $5, but one of them – a couple of years ago – I got a check for $125.00 for something from several years prior.
There’s really no downside to it.