If you're the average user, maybe, but I'd bet the fact you're willing to pay $10 for it makes you far from the average. It's very possible that many users make

If you're the average user, maybe, but I'd bet the fact you're willing to pay $10 for it makes you far from the average. It's very possible that many users make them a few tens of cents a year, which suggests that at the top end they must have users making them $100? Maybe more? Would you pay $20? $50? At what point is it too expensive?