My son’s ipad was a result of him having earnt the cash himself doing a pamphlet run on sundays (with our help at times). Kids can earn the cash if they are keen (child labour and all that), he is 11 and we do help him, however I had a morning paper round at his age and it never hurt me apparently (twitches a bit and drools). When he bought it he was aware of the limitations, not to be used in the bedroom, screen time limits, screen bans for bad behaviour means it gets confiscated for set times, etc.
Never had to give my daughter a screen ban, but she would rather read a book (seen as very unfair by my son though)