So Im confused, do I have to pay to use coocon?
No. You do not have to pay for Cocoon. Cocoon has plans that feature high compilation time, more projects per an account, and bigger file sizes for projects but all of that isn't really important. Want to have more projects? Make a new account. Compilation Time? Have a bit of patience. Bigger File sizes? I don't think there's a way to separate files with Construct 2 and end up uploading a file size bigger than 50MB to the Google Play Store but other companies do it, I just really do not know too much about it.
Really the only draw back is their splash screen removal price. $500 per a project to remove their Splash Screen, the Splash Screen itself is not really the problem but what on earth!! $500! It's crazy.
The free account allows for 2 projects and everything else is normal. I really do not understand their logic but a company must make money somehow.