Well, then a possible explanation is that people don't submit much projects to their website anymore and thus there are only "old" projects that are getting mor

Well, then a possible explanation is that people don't submit much projects to their website anymore and thus there are only "old" projects that are getting more and more mature and thus needing less commits. I couldn't find any figure to back this though. But I do remember that Ohloh used to be quite popular and I'm sure as hell that it's not anymore.