Surely you (Stripe) must have known that providers would respond.
If people are saying "Feature X in stripe is awesome", it isn't lazy to copy, it's smart (That's what startups would do). They quickly catch up to your product and hopefully (for them) innovate further.
I get you'd be flustered/angry you have a worthy competitor (with way more resources than you), but companies don't have to be innovators to be competitors. You innovated, and got first mover advantage, now comes the competition.
I don't think he's upset because Stripe has a new competitor. I think he's upset because MasterCard copied every little detail of Stripe, down to the wording and the little UI details. I would be upset, too, if a large company released a product that was a mirror image of mine.
If people are saying "Feature X in stripe is awesome", it isn't lazy to copy, it's smart (That's what startups would do). They quickly catch up to your product and hopefully (for them) innovate further.
I get you'd be flustered/angry you have a worthy competitor (with way more resources than you), but companies don't have to be innovators to be competitors. You innovated, and got first mover advantage, now comes the competition.