I just heard that gambling is just like MLM schemes as people only loses both in gambling and MLM schemes ?
Is it true ?
Is it true ?
I think that this is totally no sense question. Multi level marketing is a kind of marketing where people upper to you earn based to your results, and so on. Gambling is playing in game by challenging a casino and at the same
time trying to win. Where do you have heard that?
I also agree, there are far too many differences between gambling and MLM schemes.
Maybe the one that has told to you this was drunk 
Probably someone who just heard from someone about the similarities of an MLM scheme to gambling and agrees with the given twisted example. We should always verify things we hear from someone especially if he is not the one who has the full knowledge about the topic.
I'd like to believe that the source comes from people who lose investing in MLM because they are too lazy to work promoting or recruiting people or on bad MLM projects that is why they conclude that it's the same as gambling with no guarantee of winning and just based it in luck.
I've known people from MLM who made millions because they are business-minded and they know how an MLM works, MLM starts from finding a good company and knowing how to invite, recruit and motivate people, knowing that the success of their downline is their success also.
I've worked in the past with company which used MLM, but for my experience, in the most case, there were only ponzi-scheme company hided by MLM marketing.
You can compare gambling with HYIP, this is true, but the real MLM is really another kind of thing and shouldn't never compared to gambling.