is that really valid here? i-sh is on testflight, the intersection of cant figure out testflight and can use a terminal must be pretty low.
i can use a terminal and didn't know testflight even existed... so there's at least one.
Isn't there an upper limit on the number testflight users?
Yes, 10,000. iSH is also distributed as an IPA that you can sign and install.
Do you need a paid apple developer account to sign and install it?
You can sign it with a free developer account, but I believe that you have to re-sign every 7 days as opposed to every year with a paid developer account.
Testflight builds expire after 90 days, appstore apps live forever.