This is also good. Having a small, passive presence in the threads is always a bonus.
I tried to do this for the last griffon thread on /mlp/ as it was nearing its bump limit, when they were arguing over if the threads should continue or not due to lack of activity.
Unfortunately, by the time I got home from work that day, the thread had reached bump limit and was on page 9. I don't think very many people saw the recommendation.