Extensions category to start with. There are many over the last years. Plus this list doesn't include those that don't post in that category.
My job is not to test 3rd party tools and decide to pin them or not so that our users are aware of the tools. Authors of these products post here if they want to.
We may be, but that doesn't mean adults don't get hurt feelings.
So you would want to scroll through 100 pinned posts before reaching new content? When we have 4-5 pinned topics I get told that this is to many and it detracts from the users experience.