Report so far:
I have 0.9770 ETH to play with here, total.
I got invited to the special wave 1 drop because apparently I was in the "bad link last time" group. Last time was such a clusterfuck that I didn't even realize my link was bad, since nothing was working for so long.
Anyway, I bought a Z7 filly.
After 10 minutes, there were horses left over, maybe because it was a special drop. I then bought a Z10 and three Z9. Eventually it stopped letting people buy, even though it showed horses left.
I still have wave 3 to be part of. I will target a Z7 colt and maybe add some more Z9-10 if I can (but I think it will be harder). This begins in 5 min.