Have you played Raid Shadow Legends, or subscribed to NordVPN because a YouTuber talked about it? I don't know anyone who has played Raid, and I am kind of curious if it is actually a thing.
I can had honestly say that I haven't bought anything based off these advertisements, but they must attract reasonable attention because they are so common.
And I know that a lot of the ads happen because YouTube demonitises everything. But the ads mist bring in enough money to make them worthwhile.
No. As a principle, I try to avoid buying anything that I see advertised since it probably means the product is being driven by marketing rather than quality. A quality product has an enthusiastic base of customers who will organically spread word-of-mouth endorsements.