If this is not an April Fools' joke, it would be interesting to know what miners are they using to achieve such incredible roi. Well, scrypt.cc would defend that they are trading altcoins, but what about the others 
I think they are ponzi.
I think they are ponzi.
Scrypt.cc is more ponzi then all of them together. 60 days ROI and you sell this to outsiders, yeah right.
Do you have any proof that Scrypt.cc is giving ROI in 60 days ? Then I must try them...
There is a calculator on their home page which gives you 60+ days result. Recently they had some drop in payouts but ROI s still unbelievable. No proof they mine at all though.
I am looking for ROI proof, NOT mining proof. Bit-X does not provide any mining proof either except for some vouch they got from BitFury by bribing them.
Do you have an evidence backing your ridiculous claim?
Do you have any evidence that bitcoincloudservices.com, cloudmining.website or cloudminr.io do not have their own miner ?
I would gladly accept any ASIC producer vouching for any of these companies you have mentioned as a proof they actually mine. I would also gladly accept any other proof known to man. No? Why not?