What we see here is a beautifully executed very clever idea - which we all (as hackers we are) project into "this should be succesful" and then we see KPCB throwing $7M at it - so it all makes sense and we are happy as hackerdom is victorious.
However, what I'd really like to learn is where success if coming from in this case. ie., who is using this today? Who specifically this is being helpful to?
Is it TONS of small transactions, or have you found a high-priced vertical willing to pay your 30% cut?
I mean, how is growth looking like today? $7M is a lot of money!
Just asking because I am really interested in the details - since we all know that a "great idea" is not enough - there must have been a lot of dirty and beautiful tricks to get traction - and that's the part that is interesting!!