As a developer, you have the same right to choose license as the right a gamer has to choose the price of games. Every time a game is not a GOG-pay-what-you-want, you are violating this right of mine!

Alternative, you might simply not like the fact that people are giving you something for free and then ask you to not put restrictions on it. Its like when someone give to charity and they ask that money sent to starving children do not get spent on booze and guns. Its immoral and wrong, but hey, everyone is free to their opinion.