There are a number of authors who do make a living by blogging. WaitButWhy and DaringFireball come to mind but I'm sure there are others. Ads and affiliate link

There are a number of authors who do make a living by blogging. WaitButWhy and DaringFireball come to mind but I'm sure there are others. Ads and affiliate links did drive non-trivial dollars to my site in the past and while I didn't do it full-time it was much more viable than it is today.