There is a thine line to make conversions (sales) with FB between b2b and b2c .
B2C like trends, hobbies, entertainment channels on youtube (politics, conspiracy whatsoever) will be much harder to convert to sales , because this audience is not in mood to search for solutions, or buying workshops, products, coaching/consulting.
B2B: this audience people are looking for solutions to fix their problems, they are more likely to convert into sales, B2C people not, they like be entertained, looking fo rnew trends and gossip whatsoever.
B2C yes there are big influencers who have big list of premium subscribers list and making millions like Teal Swan, but check out her low tier premium newsletter- she makes serveral millions alone every month with that newsletter- subscribers get a ton of big library include; 250 videos each good 1 hour long as a free bonus!
Another example: you running a politics, conspiracy youtube channel, how you will make money with this? The people who are watching and subscribe to your channel want entertainment, they not looking to buy solutions to fix problems in their life or have the money to buying highj ticket items. Very hard to convert a big trap, not let the big base of views and subscribers from these influencer channels blinding you.
Converting B2C you need a lot of content as a free library bonus in your offer before this audience will buying from you. In B2B niches I not have ssen this.(very rare).
So my decision is I go into B2B because I have some knowledge there, I know the problems of this audience.