For me, I had some of the mentioned ad networks for a bit. But, they were all not to my liking in terms of UI and added unwanted cruft.
I always wanted to run my own ads, but I thought “Hey, I don’t have enough traffic.”
I think people underestimate (as I did) that if you write about a niche, even if it’s a broad topic (for me, iOS) that you can do your own ads for a nice bit of money.
I make about $12,000 from running my own sponsorships annually, and moving them to monthly only slots has been a revelation. I started with weekly, twice monthly and monthly but man - it was quite a bit of work.
I’ve hit a very nice sweet spot where I now make money from doing something I love, it’s manageable and it pays for my family vacations, kid’s sports and travel teams and Christmas. It’s great.