There's a good chance many people will dump their SPR right after the HLM snapshot, so dumpers will need to be quick off the mark. It's therefore going to be exciting to see whether price continues to climb towards the end of month (snapshot), or if people will dump a couple days before to ensure a nice profit (but forfeiting their HLM claim). Hodling both can of course be worthwhile too. There are many ways to play this game. Nonetheless, I am excited to run a master node for the first time. 
I sure hope Bittrex allows us to claim while keeping Spread there. The windows spread coin wallet isn't stable enough to entrust 1000 spread on it. I might keep my spread after and run some masternodes on there too, but I do not like the competitive cap for masternodes they have. The price to run a masternode will skyrocket well past 1k if the coin is successful. Dash has 4500 masternodes and Spread is capped at the 1,000 masternodes who have the most collateral. I don't think Helium should go the same direction.
I am not sure SPR has masternodes, the last time it was only a plan (for a few years).
In the Helium blockchain, everyone with 1000HLM will be eligible to run a masternode, there won't be any limit of the numbers of the masternodes. Too many masternodes won't be a problem, as the HLM supply is very limited and not only Masternodes will require collateral, but the Service nodes as well, probably much greater collateral that the masternodes.