That’s incompatible with corporate greed. They will look at a billion transactions for $0.05 and start thinking “What if each of those was $0.50? Or $5.00? Or $50.00?”.
Without a regulating force (such as laws or consumer power that isn’t just neoliberal lies) , it will always grow to absorb every available dollar it can.
And realistically, charging people 0.045€ for the service they actually use won’t make them nearly as rich as charging people $50 each month for the $3 dollars they use.
They’ve already done the maths to prove it. It’s why it’s never happened.