If they are pushing you a referral link, you better do your due diligence.

If you look into the math on mining contracts, the only real way to profit is referrals.

However, in people's defense, it looks good at first. You have to understand difficulty adjustments and do a fair bit of math to see just how bad they are. It looks like free money on the webpage.

Bitconnect just looks like a typical ponzi, much worse than mining contracts, which are just "bad purchases" not ultimately highly likely to be a total scam.