This whole thing is such a farce. Ecuador doesn't care about human rights, and the US doesn't care that its enemies know that it's spying on them. It's diplomacy in the service of directing embarrassment.
Of course, they might try to hold out and see if they can get some more high profile refugees first, but given that they don't seem to actually care about human rights, I'm not sure I see the downside to cashing in at some point, from their perspective.
My biggest hope right now is that since Snowden seems to be extraordinarily on the ball regarding world politics, he has a better idea of the situation than I do.
(I spent two months in Ecuador this year)