Had they simply done that, and then released a 1.1 OGL that simply removed VTTs from permitted products, going forward? Nobody would have said jack. It would have had a thread here, on DDB and rpg.net. Discord would barely have raised an eyebrow. Gizmodo wouldn't have bothered to write a sentence on it.
I don't think that is true. I think Roll20 has more people on it than Foundry. There was going to be a backlash if they pushed groups out.