This is hardly restricted to MLM mom groups. What you've described is the cornerstone of every "motivational speaker" business model. You know, the types buying pre-roll ads on Youtube before any and all self improvement videos, promising they'll tell you all their secrets if you sign up for their $500 online course, but available for a limited time for $20.

The same goes for "thought leaders" selling "masterclasses" on "building an online business" or "blogging from home". I won't even touch on the crypto space which is full of these charlatans.