Yes, and there are widely distributed tools (Lucky Patcher) that remove that license check. As long as you can jailbreak (or sideload) there will be a way to by

Yes, and there are widely distributed tools (Lucky Patcher) that remove that license check. As long as you can jailbreak (or sideload) there will be a way to bypass the copy protection, unless there is a server-side feature with server-side receipt validation. Ever has it been thus.