Anyone having lots of @gmail signups for b2b products?

I have seen a lot of people say ignore these folks and others wanting to reach out to every one.

We had this problem and have been testing flagging which of public email signups who are on a trial or paying actually have a real business with commercial intent behind them.

We saw some good results with some businesses we tested it with, but I wanted to see if it works for others (let me know if you want to give it a try for free!) and how people are otherwise solving it today.