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.