Worst idea I've ever seen on this forum. Mining contracts are worthless and every cloud mining business is a scam until proven otherwise (earning profit or even breaking even - not counting nicehash here).
Also please correct me, but didn't this J. Blasko simply dev cloned coins and didn't ever implement any advanced features?
Here the decision on what investments to make is up to the investors themselves.
You can always say on what contracts will be purchased, thus helping to avoid scams.