If you are against doing a snapshot..
Thanks for your ideas. Much appreciated.
Taking a snapshot is in the OP, so I'm not against it.
Yeah, I saw that but then the picture you posted mentioned the use of an escrow again. When I think of distributing coins via a blockchain snapshot, I think of loading my private keys into a client to claim my coins. A fully automated process.
If that is too much of a pain in the ass for some reason (I assume addresses in HLM will not be formatted the same way as SPR addresses which might cause an issue?) then use the escrow. No reason to make people send their SPR to the escrow though. Just have people sign a message with their SPR address, that message being their new HLM address. Escrow just needs to verify the signature, get the SPR balance from the snapshot, and send off the appropriate amount of HLM. Once he gets a system down, it shouldn't take the escrow any longer to distribute coins via this method vs having everyone send him their SPR.
Also, you are out of your mind if you think Bittrex would ever agree to send their customer's coins to an escrow. Bittrex doesn't necessarily have to participate (nor is there any guarantee they are going to participate even if we take my approach) but if SPR does high volume leading up to the HLM distribution and Bittrex essentially ends up holding their customer's HLM after the snapshot (whether they want to or not!) it is going to be very hard for them to say no to listing HLM immediately.