Yeah. Because they're 14 and don't have a credit card, or they don't have any money, or the price is completely unaffordable (looking at you, IDA) or they hate your software and wish your company would DIAF but are forced to use it for various reasons anyway.

You might as well be nice to the people who will give you money, so that they'll give you money. Being hostile to people who are trying to give you money is rarely a winning business strategy.