I treat every blog I read as if I have a lot to learn from the author, as if the writer is my teacher. It’s a high standard, but it needs to be. My time and attention are my most valuable possessions. I have a limited supply and can’t buy more.
There are so many photography blogs riddled with so much nonsense, it’s hard to imagine this kind of filter is being applied much by our community. The blogging industry is filled with those who’ll sacrifice what’s best for their readers for what’s best for their advertisers. Consider who you’re giving your time and attention to and whether you’re learning anything new. If you wouldn’t consider your blogger much of a teacher, move along. If you don’t find a suitable replacement, you’ll regain precious time and maybe learn a thing or two on your own.