> as it is server-side software, GPL had not changed much here, you have to provide the source of your program only to those who got delivery of that program, b

> as it is server-side software, GPL had not changed much here, you have to provide the source of your program only to those who got delivery of that program, but that is not covering running on your servers. This is exactly the reason the Affero GPL was invented. And, yes, there is no legal requirement to donate money. However it shows bad faith and it shows that "a corporation using your code for their profit without giving back" is a reality.