There's the good, the bad and the ugly.
I've met some that are among the most professional business people I've encountered, with smarts, a business plan, execution, media buying plan - taking advantage of the opportunity.
Then there's the average enthusiasts that went for it and many do make solid money (it reminds me of the live cam industry back in the day, when it wasn't this saturated and one could make relatively easy money with a cam studio). When some of these do make money, they often like to show off and brag.
And then there's some - not very sharp, low impulse control - but overconfident and over motivated. Often very loud and showing off way too much, these attract the unwanted kind of attention and may end up in trouble.
All and all - it should always be a win win type of a scenario.
The performer gets more exposure and more clients, makes more money. The agency that delivers gets a cut from the revenue.
The truth is many of the performers can do well in front of the cam, but very few are tech and marketing savvy enough, to be able to deal with the daily grind of marketing themselves.
Not to mention for those doing this part time, an agency may be the only option to get solid exposure.
To get a large following takes an immense effort and a lot of time.