a. Existing customers already got their hands chopped, their prices raised, or their lawyers poked. They're stuck with an abusive, litigious, opaque vendor and will migrate out when they can. Many are stuck.
b. Prospective customers must have some compatibility need or they'd look elsewhere.
c. Developers won't be fooled so rule them out :)
https://www.youtube.com/watch?v=-zRN7XLCRhc&t=2308s
Start at 33:02 for full rant.