Well, suggestions are just that. Suggesting an idea. It's up to the site owner, Robo, to decide, first, if it's a valid idea to consider. Then to make the choice. From there he will decide his ability to move forward with ti considering time restrictions and finances. Robo is the only person that works on the site, so any updates, fixes, changes, etc... have to be done by one person that hosts 3 web sites and has a family.
From what i can see, at least half of the suggestions are just repeats of things that have already been decided against.Many of the suggestions seem to be new chat room/forum section ideas. They seem to not be implemented usually do to a lack of need or enough support for an idea.
Some ideas are things that just have to be on the back burner until time/money is available.
I don't know for sure, but i'd guess more suggestions are not taken than taken. Which makes sense, really. Many suggestions made seem to be more oriented to the person making it, rather than an overall improvement to the site itself.