Also, we used Freshmeat for most of our public announcements around the same time (a bit later, and partly togehter with sf.net). All went extremely well, until out of the sudden they had the bright idea of a "redesign" that made the site unusable. Again, bad hit for us.
For example, I tend to file the bug number (actually a link to it) in both commit comments and the change log. If I now link to sf.net, github, etc and they "go away" (some way or the other), all of these links become invalid and I don't have a chance to fix this (again, I've actually experienced that, so it's not pure theory). And such things happen. For a non-rsyslog example, think about the bitkeeper debacle, where they out of the sudden thought it was due to charge kernel developers for so-far free services.
Again, I would really like to have some of the cool things. With git, it's relatively safe, as I can move the repo around quickly, and as long as the rsyslog.com site contains the main pointer to where the current official git is, the risk is very limited. But other than that, my experience is that the short-term benefits come at the risk of severe long-term problems.
I am open to really good arguments why I am wrong. One good argument would probably be an OSS complete hosting service that is in place for 15+ yrs without any interruption in user base and breaking URLs - and that is still a hot spot. I guess sf.net mostly qualifies in that category, but as I said, we had our own story with them...
I frankly admit that I am very conservative in this regard. After all, I even post things like this on my personal blog, and not on a site directly owned by Adiscon. But, you may say, you use blogger, so don't you take a risk here? Well, you probably have noticed that I use blogger under a domain that I have full control over. So whenever they go crazy, I can move on to some other place (not totally effortlessly, but I am in control of those things).