Sort of, and I agree there is a possibility that people shift to only visiting every few days. But the rationale is a mixture of avoiding a website looking dead because there are very few threads and also avoiding the need for people to have to do extra clicks to see whatever they are interested in. As I tried to suggest, there are no hard and fast rules on these things. Even on a commercial website with active monitoring of how many people are visiting when it is a matter of judgement, and more so when there is no business incentive behind it.