Without having to dispute on claims you’ve made in the OP,
I would say, as much as some of these guys actually make money through the ads view on the content they create and other programs they host through there channel(s), some of them are getting some true success.
A quick note:
The term we mainly refer to as professional traders have come with a different definition as against what it’s assumed to be which is; traders that have a good level of expertise on there trades or happens to be pretty successful.
Professional traders are individuals who trade on behalf on an institution (institutional traders) and are being paid for their services.
Something to note, we have more day to traders newbie and petty traders than we could have of any self proclaimed expert traders and as such, they’ve got to be more losses than profit to some individuals, that in itself is a fact.
The definition of professional indicates that if a person can earn money from the business in which he is engaged. Accordingly, if a trader can make money only by trading, then he is a professional trader, if he makes money from advertising exchanges, or some other products, receives profit from referrals and the like, then this person receives the main profit from advertising, but his trading is not so successful then this is something else.
If a trader could only earn money from trading, he would not be promoting other products. This is mainly done by traders-bloggers and I don’t really trust such people.