I used nicehash for the last 2 months selling my hash power, and the reason for that is because it was more profitable then other multipools, and last 2 weeks that changed.
This system needs some regulation
Not really. It's basic demand and supply, there is no need to mess with it. If providers feel they are underpaid then supply will decrease and if there is still demand then prices will rise. Which brings providers back.
Um, yep, this is why price thresholds are supported in the password field ... I was using them back when NH was more profitable than my multipool of choice, and I continue to use them today ... I update my threshold every day based on the rolling average previous 1/3/10 days of the multipool - if NH can do better, I mine here, if it can't, I mine there, fully automatic, no need to pay attention to where my hashes are going, nor to come here and complain about things ... I hash for whomever I expect will pay the best, and the money shows up in my wallet at the end of the day ... perhaps more people should give it a try so they have a little less to get stressed over and complain about ...