Congratulations to Patrick, John, & the hardworking team @ Stripe! Looking forward to more stellar growth in the future. An investment by AMEX is acknowledgement of an interesting company in the card space. However, an investment by Visa is essentially an industry nod of approval. Seriously can't wait to see what else they have in store.
I'd be happier if they tried to take out the credit card cartel rather than seeking its approval. They're in as good a position as anyone to make progress in that direction, but I suppose everyone has their price.