... Do you think it is likely the operators will just run with the investors money?
'pool.bitcoin.com' is highly unlikely to run away with your mined bitcoins. People behind the bitcoin.com pool are not random no-name figures in Bitcoin space. Roger Ver, Andrew Stone, just to name a few, are prominent figures in Bitcoin space, not some random crooks that nobody has met. Pool can sustain itself with 110% PPS because TX fees (which are not shared with PPS models) account for more than 10% of block reward. Assuming a long-term pool luck at 100%, they will make a small margin for themselves with PPS@110% model. My personal preference is for PPLNS models because in the long term they are likely to be slightly more profitable. With any PPS models, pool operator assumes the risk of orphaned blocks and bad luck, not the miner. Therefore, as a miner, you generally pay a little extra for 'insurance'. I do not mine with them myself as my preference is PPLNS at lowest fee possible, but if you want stable predictable payouts, they are either top#1 or top#2 PPS pool in terms of payout percentage right now. Worth a try!
PS. While I can say that pointing your ASIC miners to their pool is highly likely *safe*, I can not vouch for any of their cloud mining contracts today as it's unclear from where the hash rate comes from. If they re-sell hash rate bought from somebody else, they are just the middlemen, and you may end up overpaying. In complex ownership structures, it's also difficult to have a clear picture of the asset at hand - who owns what, who bears responsibility to provide support, is the support offered by bitcoin.com or someone else, and if so, does bitcoin.com pool open support tickets to another entity, possibly resulting in very lengthy support delivery times? I have no answers to any of that.