If you want to mine with CPUs Monaro would make more profit than Steem and remember you are mining Steem but getting paid in Steem Power, that is the big red flag to me.
Imagine if you were offered two jobs, one paid you weekly an amount that may vary but you can spend straight away and another that would not pay you for your work for two years and then it could be pretty much any amount of money not at all related to the work done and force you to do extra work to not actually lose money.
Which job would you take? My computer says 'A bird in the hand is worth the promise of two sometime in the future in a bush that has just been planted' and refuses to mine STEEM.