Recently both Mis-nagid and Godol Hador have thrown in the towel, quit their blogs and deleted all their posts. Why the abrupt bailing for each of them I'm not sure, but I do have a hypothesis for why they both acted similarly.
I don't think it was some conspiracy but rather a case of convergent activity. Both Mis-nagid's and Godol Hador's blogs were incredibly active. They would sometimes post several times a day and get dozens and hundreds of comments to their messages. For just one guy, that kind of constant full activity could just be too much. It's like coming home from work and then seeing another load right in front of them. At first it would be fun but after awhile (a few months each) it began getting tiresome.
I think that it was a case of burning the candle at both ends. Their blogs were great to read, no doubt much better than mine. And they really tried giving something to their readers on a very regular basis. But that's _hard_ to keep up for any length of time when a person has many other interests and responsibilities in life.
So how do you keep a long-living blog (says the one with five months to his name)? By keeping things in moderation. I post messages only semi-regularly. Sometimes five in a week, sometimes none. But because of how irregularly I post, I feel little pressure to constantly put newer and newer material out there. And because of this little pressure I have no desire to put this blog out of commission. Even if I become uninterested for a few months I can leave it as it is and come back to it when I feel like it.