No point starting a blog if you are unable to keep it updated.
I culled six blogs that were inactive three months or more. We all have periods of inactivity due to real life, and occasionally my inactivity has extended to close to one month. I think three months of inactivity is too long, and is enough of a period to consider a blog is dead.
Culling is important as it eliminates dead wood. Blogs are a living ongoing activity with occasional periods of inactivity, but it is no point following blogs that stop having anything to write about.
I have offset the losses by following twelve active new blogs that I have found in recent days.