The only VMs between you guys admit time zone issues on both sides and the need to coin flip. I can't see your PMs, so I'm going by those established difficulties, the fact that both of you were online, and that no battle occurred: a coin flip seems fair in that case.
Omanyte hadn't even been online since the round started, making an activity call much easier (I usually stick to coin flips for mini-tourneys, but considering he wasn't on at all, it was much more intuitive to make an activity call).