There are a lot of things in life which are free. Just look around. Not everyone's into making money, when they make something. I will give you an example because I was just contemplating on this the other day (I have no involvement in this). Take a look at this communication platform (1). Read up its FAQs, its TOS, its history of existence, etc. Now tell me, how and why is this free? Then reflect on your own comment about money being involved in "everything".

(1) https://www.threadthat.com

The Ads exist because they are selling on top of something else altogether. When the Adblockers come on board with the same goal, they defeat the purpose. I am just indicating this apparent cycle, which is fundamentally odd. I am not making a case for or against Ads or Adblockers.