I made a roblox game years ago with no more than like 2 concurrent players at a time. The game's ideas were immediately copied by a much bigger game (this turned me off the Roblox platform for good).

I still got enough robux to DevEx just from premium roblox subscribers playing the game. (If I cash it out i would get a few hundred dollars. Which is nothing for me today but absolutely a lot of money for an aspiring teenage developer.)