This scheme is basically dumping, where you (a company) lower the price of your good and then flood the market to kill all competitors. Then when they're good and dead, you jack up the prices to extortionate levels and sit back and get piles of money, from people with no choice.
https://en.wikipedia.org/wiki/Dumping_(pricing_policy)
And in this case, the grievance is against all companies that give away "free service". I also wrote up the thread about GitLab doing what they're doing should never be called free. And I believe that an interpretation of FTC guidelines actually does call this behavior out as bad.
https://www.ecfr.gov/current/title-16/chapter-I/subchapter-B...