Thanks for the replies. I've been in discussion with them and I think it was a
misunderstanding on the Getty employee's side. He's now assured me that any payments
<$50 will eventually be paid but it's to do with the way tracks are registered in their
library. Any tracks accepted in Pump's library are bunched together under seemingly random
contract numbers, so if you submit 100 tracks, 10 might be under 1 contract, 25 under
another etc. It's these separate contracts which need to exceed $50 before payout, so it
should all come out eventually.
In terms of who's using Pump, I don't recognise
a lot of the client names although there have been a few bigger names (e.g. Red Bull) but
their prices seem to be dropping, and with only 35% of that coming to me I'm probably
going to walk anyway.