well the 10mb rule is optional, I’m sure more than one entry here uses more than 10mb.
now I’m not the host but probably 10mb reffers to the final executable + assets and libraries, my game executable takes like 300kb but it also has a 6mb dll so the final size is ~6.3mb and the web build is about 300kb too, however the source code is actually over 12mb (compressed) but since that’s not requiered to run the game, it shouldn’t matter.