[ars]

Maybe, maybe not. Compilers are quite large, especially once you include dev versions of system libraries.

[red-iron-pine]

if you're uploading a compiler you could just upload a binary. unless it's a very specific system you can probably just put it together "at home" and slap it in there.

[ars]

I think you entirely missed my point. Because there is no compiler they have to upload something.

With a compiler they can compile something locally which is easier to do.