Boy you are STILL clueless arent you?
Oversell your resources, it WILL catch up to you. Well maybe not you specifically since I doubt you will have enough customers to fill a VPS, let alone oversell it, but you only have X amount of space and transfer. Once you hit that cap then what do you plan to do? You going to pay the overage charges associated with reaching the cap or put up with the plethora of complaints when your entire host is shut down until the next billing cycle (Which since you will say "But I one a fre vsp srvr", its the start of the new month)?
You say you want to help people but what you state in the first post is going to royally screw people. You would know this if you had the slightest idea about webhosting, and dont even try to blow smoke up peoples asses saying you do which will not only make you incompetent, but a liar.
BTW, you try an sell this oversold idea of your, be prepared for a LOT of chargebacks and lawsuits if you cannot cover the costs. You think this is all fun and games until you get sued.