Who are these 20k people and why would they be interested in following an account being paid for promoting products in a very obvious way? Of course the ideas o

Who are these 20k people and why would they be interested in following an account being paid for promoting products in a very obvious way? Of course the ideas of advertisement aren’t lost on me and I can see how a product mentioned on Gruber’s blog or podcast would be somewhat persuading, but the difference is that Gruber seems to be curate and select advertisers he actually cares for and enjoys, products that are actually relevant to its audience. The sponsored content on instagram however looks rather random and open to any advertiser - I don’t see the appeal to the followers of said accounts. Maybe I’m just too narrow-minded.