So don't do it for ads, but you should do it for ranking. You have a large body of content waiting to be exposed and once it does, if you later decide to write

So don't do it for ads, but you should do it for ranking. You have a large body of content waiting to be exposed and once it does, if you later decide to write a book or do conferences or do training, then your blog will help you achieve that. You should be rewarded for the effort you have put into helping other people.