So, people are supposed to go unpaid for their hard work, ok.
Paid updates are just a way to squeeze every penny out of a customer who already paid $50 for your stuff.
"Hey dudes, I know you bought our stuff but we made it better."
"That's cool, that's cool, so can we have it?"
"About that, it's going to cost you $20 to get our new stuff."
"Dudes, I already paid $50 for your game? Think you can just give us that update?"
"Nope, sorry, can't be done."
"forget that noise, I'm going to go play Garrysmod."