Just signed up here. I heard about scrypt.cc yesterday. It seems too good to be true really, but some people on this forum said it's legit. I put in 2.3 BTC at 5:00am EST this morning, and so far have been consistently getting around "0.00010571945610659331 BTC" in the balance every 10 minutes.
*Edit* So it has been giving me exactly as I calculated so far...
Pic:
https://dl.dropboxusercontent.com/u/22002474/profit%20so%20far.pngThe site really sucks in terms of user friendliness, and overall GUI. It took me a while to realize that the money I make goes back in the balance. You'd think they would use AJAX, and have some bouncy coin or something fly up to show you got coin, or Mario bouncing on the screen... hmmm nm.
It seems to be that when you put money in you're banking on a few things:
1) People will still value crypto during your investment (most likely they will, crypto seems like the future - especially with video game / facebook generation - as they have so much trust in digital world)
2) The myriad of coins scrypt.cc is mining are still viable (seems likely not to)
3) The price of bitcoin doesn't plummet (i have no idea)
4) Your friend doesn't sneak on and steal your stuff
5) Scrypt.cc is secure so hackers don't destroy scrypt.cc (hopefuly not)
6) Government doesn't shut it down (hopefuly not)
7 ) Natural disaster or you die (hopefuly not)
8 ) It's not a some kind of scheme (crossing fingers)
I am almost positive I logged into the site without https, and that was rather unsettling, but it seems fine now.
You should always see https:// on the login page and from then on.
As for the risks, I really don't understand why BTC plummet would be a risk, in fact we seem to make more BTC on days with big drops.
The biggest risk has been ASICs for scrypt and in fact a few weeks ago it looked like profits were sagging. Scrypt.cc has been converting some of the GPU farm to also mine scrypt-N and scrypt-Jane and for the last couple of weeks profits have been strong.
I think there are plenty of risks you didn't list, but there is risk with everything in the bitcoin world. I'm most concerned that the market there is small and if you have a lot there, it could take days to sell it out. By a lot, I mean well into the MHS. (> 10 BTC worth) Sometimes there is many sellers jumping in front of each other, this is a great time to buy but there is always the risk I could be one of those guys someday.