Many thousands of people make an excellent living via multi-level marketing. Not sure why you think its a scam. A lot of the products (such as AmWay) are excellent as well. What I hoped happened is that you educated this person about bitcoin which possibly might open the door for MLM to use bitcoin in some fashion.
MLM's are very scammy in general. There might be some honest work in MLM's, but generally that "industry" is very, very scammy. I recommend everyone to avoid those. You can use google and research why people think MLM's are scams by default, I think it is a no-brainer.