Rapidshare

I want to get a rapidshare account as i was previously using a friends account, but dont understand the system.
For example you buy 500 rapids for 6 euro.
Does this last a month or how long does 500 rapids last for?
Answer #1
99 rapids = 1 month
Answer #2
If 99 rapids = 1 month, how much can u download in that month?
Answer #3
30GB I believe, but if you buy 1 year, you get VIP and 7% discount and so much bandwidth (I have 1.8TB bandwidth on mine )
Answer #4
rapidshare increased the price not long ago. 500 rapids will be 1 month with 5 rapids over.