Regarding the wiki, I doubt that the uploads of complied AppleScript files is helping with that. As convenient as that is, it isn't nearly so space efficient as simply posting the code as text.
Otherwise, I wonder whether another host might be in order. I don't know all of what the needs are for
qsapp.com, but perhaps an account on
x10hosting.com might work. They offer unlimited bandwidth and disk space, and will certainly support the wiki (since they offer an easy install script for it). I'm not sure how the crash reports work in terms of web host requirements, so this may not work out for that part. But at any rate, you can check them out. The only thing is that someone needs to log in to the control panel once per month to keep a free account active, but that is easily automated with a bit of bash and curl. (I'll give you a copy of my script that I already wrote, if you like). They also offer paid hosting at
x10premium.com ($3.95/month).