For the users of the forum, this would give the abillity to get a list of plugins specific from their chosen 3rd party developer.
To explain why that would be awesome, is the same as understanding why google just works!
In better words: it gives u rapid search: more specific than it is at this point.
If (as an example) i want to see "only" the plugins made by Yann, then i would have to "dig them out" in the big pile of forum posts in the plugin section, or the plugin & behavior list by Kyatric.
So a specific build in "filtered search" that has the option (3rd party developers) benifits everyone who wants to be fast and to the point.
And on the other side there is the benifit for the 3rd party developer.
Which means that they are even more implemented as a fundament of construct 2 onto the forum.
They are working around the clock to build those very needed plugins we all use.
Presenting them a tool that enables "their plugin" user to find/discus the newest of their work in a simplified way, is better than just piling up the forum pages, and keeping the fingers crossed that everyone finds what he/she is looking for.
The way it is now is like giving someone the whole forrest, even if he/she only asked for 1 tree, or a specific branded tree family.
Hope it is clear for u now, and that my explanation clearified the issue.