Vloggers ARE trying to attract viewers and viewers who will support them...
Some times, but not necessarily.
Think of it like a pot luck dinner.
I bring the dhaal, Johan brings the naan, Mary brings the line chaffon, Diana brings the samosas, Tony and Tina had a fire in their kitchen, so they didn't bring anything and Macs a rotten cook but showed up with a case of beer.
If I had eaten alone, I'd have nothing but dhaal, but because of the potluck format, I get a great meal and conversation to boot.
Now if Raphael shows up with turkey and says, I want $2 a plate for my turkey, it kind of changes the Dynamics of the pot luck, especially if their are some vegetarians in the group.
I'm not saying there is anything wrong with selling turkey, by all means, open a restaurant and sell turkey. If I want turkey, I might even come and buy some, but our relationship is now customer and vendor, rather than pals at a potluck.