And (for OP) imagine having 1000 minds helping you, giving ideas, contributing on code, fixes, etc. And all that for free. And then we all get to benefit.

Haven't you ever used a software that is FOSS? Didn't you enjoy the feeling that "aaah someone made this and it solved my problem in zero time - thanks universe/person!". Well sometimes it's nice to give back if/when you can.