Twitter charges advertisers more than $1.5 per engagement

Articles on Twitter advertising indicate that Twitter charges more than $1.5 per engagement, though it has more than 20% fake accounts. In contrast webmasters cannot even make $1/month from advertising on website, despite marketing it extensively, spending their time. Why are webmasters making so less money despite having traffic?

The big majority of webmasters sells courses or services or softwares as advertising doesn't cover the cost of twitter advertising as my single point of view.

The only marketing I have done on Twitter is influencer marketing. I have never used Twitter advertising.