For someone who is making money from it, sure, but that's exactly who this isn't about. The way they get screwed is by the 30%.
A fixed fee -- in any amount -- is screwing the people who aren't in it for the money. Because to begin with, it's not just the fee, it's the bureaucracy that comes with the fee.
You're a kid and you want to make your first app, but you don't have a credit card.
You live in a poor country and maybe the amount you can lose without noticing when you're rich isn't the same there. Or even if you can get the money, you may not have a first world bank account and the conglomerate isn't set up to take the local currency.
You're a desktop developer and you're willing to make a simple mobile app and give it away for free as long as it's not a bother. The money is nothing but the paperwork is a bother so you don't do it, and now the million people who would have used that app don't have it and have to suffer the spam-laden trash alternative from someone who is only in it for the money.
And suppose the amount is as trivial as you propose. Then why does a multi-trillion dollar conglomerate need that pittance from a million ordinary people?