MLM should be avoided right away as it's only a scheme to enrich founders (and sometimes early investors, which is never safe of course, should one be trying to be an early investor). It's just not profitable and finally, people will lose money.
It's best to avoid MLM and don't participate in it, see also my topic MLM - a dangerous marketing stratgy
Referral rewards are too tiny or if they are too good to be true, they are not true (because it's not a vital concept for an operator to spend endless money on referral rewards after all). See point 2 in my topic above (2. MLM causes significant costs)
Instead of reflink, MLM and co., there are so many better ways to earn honest money.
If you are a gambler, you can get a decent amount of money if you can get some active referrals who regularly deposit and play, giving you a percentage of what they are wagering or depositing. So, it's different from MLM schemes.