Not quite. UBI is millions of people subsidizing everyone.

This is more like 300 fanatical content consumers deciding to give a certain person $5 a month so that they spend as much time as possible producing content.

Present global ad spend is on the order of $600 billion, distributed very roughly across the 1 billion wealthiest inhabitants of the world, or approximately the inhabitants of wealthy industrial nations. This works out to roughly $100 per person per year, or about $8.33/mo.

Allocating this as a tax would more than replace all present spending on authors, screenwriters, journalists, and musicians.

See also "1000 True Fans": https://kk.org/thetechnium/1000-true-fans/

Quite probably something similar to this, yes.