I think it's fine if no one starts vampiric companies that dump free services on the public destroying the perceived value of software for the purpose of a fast unicorn exit. Of course, these companies always look to advertising for funding so they are obtrusive.

Unless you are thinking of real companies that would be affected by this ban? Retail stores don't care about this ban. Companies that sell real products wouldn't care. If they sell real software services and plan to turn a positive profit rather than exit this wouldn't impact anyone other than unicorn chasers, which are bad for everyone.