I also can't deny that I am also sometimes influenced and interested in buying several products shown by an influencer who has millions of followers. he didn't promote it directly but i saw him use the product. and maybe he is the ambassador of the product. And from that I have the conclusion that the influence of a social media influencer is really strong. and yes even we are the ones who initially have difficulty making a decision between buying item A or item B. but when a big influencer shows he likes item A. then the majority of us will sometimes believe it and make the same decision as the influencer shows.
Actually, to build a lot of followers is not easy. In fact, an influencer once told me that he even needed about 3 more years to build a reputation so that many people would follow him on social media. and only after 3 years did he really enjoy satisfying results because many products require his services.
I agree with you, to build millions of followers is not easy they did hard work to earn millions of followers. Once they earn followers its very difficult work to maintain them. you need to create more contents which have to be extra ordinary. With this influencers different brand's companies got marketing they got profit, this is why it is known as influencer marketing. May you don't believe that 86% of women before shopping they use to check about that product on social network and they use to search social influencer who gave review on that product then only they took decision.