We have an arctic fox and an arctic wolf. We have two giant tortoises. We have two tapirs (even if one leaves much to be desired) so there is absolutely no reason why we won't get a rhea and an emu.I am not "happy" and I am not against the rhea as I like Pampas enclosures, I'm just explaining Frontier's criteria when designing PZ roster and why getting both rhea and emu is unlikely.
Big ABC zoos are not the only kind of zoos, as you said small zoos also exist and that's why the list of most common animals looks like that.
But anyways, either you agree with me about the bias in the game (which reflects the bias in big zoos) and that makes rhea&emu unlikely, or you disgree with me because both species are so different and Frontier will prefer to design a 3rd and 4th ratite instead of a 2nd aquatic bird after the flamingo or a 2nd landfowl after the peafowl.
I mean, I didn't understand your point in your answer to my post, sorry