but certain eggs would required a 0.09 ETH for an OMEGA egg
Yeah, from their discord the team says that after the launch they won't be doing any egg sales, then there will only be those that new players can obtain for free, and those that come from mating.
And it seems like mating will be very limited, they won't breed like rats, as in cryptokitties. They can only mate once per lifetime, which could be a of couple months. Before they reincarnate.
Would I think be OK if a certain person is addicted to this kind of game and if your pet would die then goodbye 0.09 ETH
They say they are making it pretty hard for the ethergotchi to die and eggs can't die. But if they die you will be able to revive them, but that will probably cost you some of the ingame currency. (Which you get for free daily, based on how many ethergotchi you have)