I once talked about this sort of thing with Costello on the IRC. It was when I was complaining about how all the PSP links for various homebrew and plugins were dead at this point, and finding stuff was a real hassle. You know what I got as a response?
"That's what filetrip is for."
Maybe one day, you will be like "goddam I really wish I had that 3rd from the last revision of CHMM2" and all of the time, effort, and money will be worth the "fork" button on github. At the moment though, this thread is literally a thread saying "I'm going to personally archive as much 3ds stuff as I can, for myself, unless the developers tell me I can release it." In theory, this thread is going to get lost to the abyss, you are supposedly going to still be archiving 3ds stuff, no developers are going to give permission because they don't know this thread exists, and then by the time your archive will prove to be anywhere near useful, the 3ds scene will be dead, still without permission to release. And then when some lonely bored derp chances upon this thread and asks what happened, there will be this chat about how they never gave permission and when you try to contact them, it's a dead link.
Not only could you do this entirely wasteful endeavor much more easily on filetrip, where you can dump your uploads without publishing them, aka before you get permission, but publishing them is pretty easy, costs far less because Costello is funding it, and is going to be around for about as long as gbatemp.
Archiving isn't bad, I archive shit all the time. Your proposal however, is completely fucking dumb, wasteful, and those hours that you are spending searching, uploading, etc. going to be tossed into a blender after about 2-3 weeks of the same shit and you decide to bin the whole project.