I've seen a total of one business that was a legitimate opportunity. The rest have been obviously run by people that don't know what's going on and hope that just by making a crypto business they're going to make millions.
Any chance that opportunity was Gethashing?
I know cloud mining has a bad reputation these days, but the operation is the most transparent I've been involved with so far.
The group has also actively developed (and continues to improve) a full platform around using the open assets protocol including a web wallet (using SALT so everything is stored client side), an asset exchange, and a BTC/colored coin block explorer.
We just finished relocating our first of two batches of hardware to a new DC this weekend so interesting times are ahead!
https://forum.gethashing.com/t/ghfarm-batch-1-relocation-updates/5058?u=thepeddler
6 months and running so far.
With all the developments over that time, maybe some of the skeptics 4+ months ago should take another look
