I'm not getting this thread... There will be no "coin doubling". This has already been discussed on this sub-forum.
3. After the fork find someone who owns coins not existing on the both blockchains and ask them to send few satoshis to your account, do it for the both blockchains. Those lucky owners of coins that don't exist on the other blockchain will likely be miners or guys who managed to get their transaction not included into the other chain. I expect that the market will react to the fork by selling such special coins slightly more expensive than their face value.
One can't ask someone to do such a thing. If that person does not own coins on any existing blockchain, he can't send any coins... Because he doesn't have them. If I don't own 1 BTC I can't send anyone 1 BTC, like if I don't own 1 USD/EUR/CNY/whatever, I can't send them this money I do not have. if this was even possible, nobody guarantees there would be someone mining a transaction on the "losing" chain. There will be no special coins... 1 BTC = 1 BTC.
If coins are "not existing on both blockchains", then they don't exist.
There will be no business for the "losing" fork. If one has vested interest and is far deep within Bitcoin he will follow the "winning" chain (whether he likes XT or Core), under the risk of losing everything he has on a fork that will not succeed.