It’s a shame the strategy is now failing because software as a service is so popular. Nothing in the GPL forces you to distribute your changes if you don’t distribute the program. So just put the program on a webserver and let users interact through an API and hey presto, steal as much GPL code as you like.
Everyone crucified MongoDB when they tried to create a licence that prevents this, and FSF have declared that the problem can’t be solved with licences and everyone just has to boycott non-free software (good luck!).
End of free software as we know it, IMHO.
Weird how it’s literally impossible to ever live without something no one had 100 years ago