If there is a server wipe, will we have rewards?
Yes, if the wipe takes place, all of you will have the following rewards.If your character is level 30+ (at this stage), you will get a Level UP 30.
If your character is level 30+ (at this stage), you will get your class passives (Guard, dash, RP charge & Flight).
People who reach the maximum level (Lv 70) in less than 1 month will get some (unknown) rewards.Others:
All the cash points you purchased will be refunded.
In fact, DBOG staff is giving you a very good offer. Get cash points now, buy lvl 30 up on new chars with cash points, get cash points back and a free lvl 30 up after the server reset. You can see it as a small reward for donating now if you do not have any chars at lvl 30 or above.