I belive the points are stored separatly, so a map reset wouldnt effect them... I dont know for sure so dont take my word on it
Points are stored completely separately to the actual Minecraft world. The Points system will all be based on the site, and will simply give you items/other things on the server.
The only issue that there may be (not that a reset is likely at all) is that you will lose items etc that you have previously purchased.
Therefore in the unlikely event that there is a serious rollback or a reset, the Points spent on items (that you lose due to the reset/rollback) will be reimbursed into your account allowing you to re-purchase any items lost.