Not going out of business, but on the iPad there is a drawing app called Procreate which is a one time purchase. It’s decent, but in the two years I’ve had it, nothing has really improved and there is a whole lot missing or to be desired. Meanwhile some subscription apps have come to the iPad and they are absolutely packed with every feature you could possibly want.

For any well run company, the more the users are paying, the better the product is likely to be. With a once off purchase, any future improvements are based on a Ponzi scheme requiring constant new users which is unsustainable.