Yes
They need it to create a profile so it runs on your device
What about my serial number ? Now they are asking for that.
Not too sure about thatWhat about my serial number ? Now they are asking for that.
Not too sure about that
Ask them what they're using it for and visual proof they need to have it
Not saying they don't need it, but I'm 99% sure they don't
How reputable is the guy? What are his other works? Is he known in the community?
Licensing works through udid plus serial - otherwise you can just wait until Cydia Store is active but I have no idea when that will be.