You forget to mention the monitors that have an even better profit then the operators as they will get payed by said operators to "monitor" the paying status of a scheme and take in a lot of referral commissions while doing so. If a scheme collapses they will have at least 10 other schemes ready for you.
Absolutely. The biggest 'monitor' scamsite I know of is cmmonitor which has shilled for multiple fraudulent 'cloud mining' scams.
I have a hunch they may actually be the owners of many of the criminal operations they promote.