But often they do not participate in such schemes themselves, because they understand the risks associated with losing money, but they want to earn by attracting new participants.
You are absolutely correct. Surely they are not investing in these types of scheme sites or small amounts like 1-2 dollars deposit to show a withdrawal proof in the starting point. Generally, all Ponzi scheme sites make a huge referral bonus system to attract the promoter and these guys take these opportunities.
Btw I have already tagged and flag supported when I see this first time.