The only down fall I see for those that have a Premium-Account is, you don't have as many files for people to download if you go up to 300MBs.
If you have a Premium-Account, you get a free month after 10,000 hits. So in the end, you will lose some hits. But then again, if you download alot from RapidShare, you are much better off getting a Premium-Account. Cuz there are no limits of what you can download or upload unless you have GBs worth of stuff to upload at one time.
I started in I believe some time in Feb. and already, I have 4 free months and I have not put much stuff during the summer. Yet there is someone here that is putting stuff up that I know of and he must be getting alot of hits by what I'm seeing
BTW, to that person (I will not mention) it looks like you are doing very well over there

and glad to see it. Take Care