Added scrypt.cc. Please note that it is quite different from anything else on these charts, so proceed with caution. High yield comes with an initial investment cost roughly twice the cost of buying mining hardware as of today (e.g. Gridseed Blade). That is counterbalanced by the ability to trade hashpower in a fairly liquid market. Weigh carefully whether or not that is an acceptable risk for you.
Honestly Scrypt.cc sounds like a ponzi scheme. High initial investment? check... Unrealistic rate of return? check... at some point they'll disappear with your money, it almost seems guaranteed.
Well, I dont defend Scrypt.cc (as I dont use them), but approx the same was said previously about Cex.io...
Cex.io grow big, Scrypt.cc is (is it?) the 1st scrypt cloud mining service, time will tell, there is always risk when trusting your funds to some online service (just remember inputs.io, 50btc, gox, coinex etc)
I wasn't around the mining game when Cex.io came out, but did they have a rate of return that was significantly higher than would be expected? The KH/s rate at scrypt.cc right now seems absurd with suchmoon's first two days of reporting. If it continues to be an outlier in performance it would almost have to be a scam since otherwise other's would be able mine in a similar manner and get the same return. It could be they 'underreport' the mining rate so you're really getting more KH/s than what an equivalent cgminer would say you're getting so in reality the numbers would be similar. For example 1MH at scrypt.cc is actually equivalent to 1.2MH reported in cgminer which would account for the discrepancy in suchmoon's numbers as you're not truely comparing apples to apples.
Right and cars were a scam because they were faster than the horse and buggy.
A couple months ago when scrypt.cc was young people were pointing out how the yield at Middle pool was so much better. It varies all the time but they have a staff working on the yield and they don't follow the crowd, they have their own ways of picking coins. They are also in Brazil and have a power contract keeping their power costs low which is key for a GPU farm.
Anyway they are a lot less than 2x the cost of Gridseeds unless maybe you are overclocking the Gridseed to 500 KHS. Current a KHS at scrypt.cc costs less then .00145 or $.62. So 300 KHS costs $186 at scrypt.cc. You don't have pay for anything else. They also have a huge advantage over ASIC as they can mine scrypt-N and scrypt-Jane coins and ASICs can't.
When the Gridseeds started showing up a lot, the profits went down but after a couple weeks and then back up as they were reconfiguring GPU to mine other coins. They have a huge operation and the scrypt.cc part is less than 10% of the total hashing power they have. I think that is an advantage as they are also mining for themselves.