I don't see the reason why someone would need to cut back if it's not affecting them adversely...

Generally, I always take a look at the forums. There was another forum that I avoided for several months. No specific reason other than I became bored.

Now posting is another matter.. That tends to go more in waves... I either relate to everything for a period of time or nothing at all or no opinion one way or the other.

The other forum I still look at daily, but havn't posted to for awhile because I'm not relating to any of the topics, and the same here to a lesser extent. This can include taking too long to get to the point, post is too long, don't even bother reading it. I'm just not interested or have an opinion worth posting, enough people have already posted comments that I agree with so mine aren't necessary.