Firstly I absolutely 100% DO NOT want to be a rep for any MLM. Even if they made a squillion pounds a year I don't think it would be worth it for having to create a Facebook group and post cringey quotes all day.
Anyway, I do use some Tropic stuff and I'm also part of a Body Shop group as now and again the rep does good discounts on stuff I'd buy from the store anyway. The latter often posts redacted wage slips from her 'boss' with £3,000 a month - HOW?! From what I see most people buy a shampoo now and again for about £4 a bottle! I certainly never spend more than about £6 with her. She's trying to tout £5 make-up bags today and has been challenged to sell 5 apparently.
The Tropic stuff is a bit dearer and the 'ambassador' (🤪) talks about holidays to South Africa and getting fancy cars (again with mentions of the elusive boss) but again most people spend the odd £25 and if they only make 25% then they can't be getting more than a couple of hundred quid a month. Even if they sold 5 times that much, it's £1,000 a month, and her boss allegedly does that as a full time job!
How much do they actually earn?