they are not giving him money he won. the $897.11 is just his initial deposit that they are letting him withdraw before closing his account. (at least they didn't take his deposit as well, like some others do)
I re-read the PM he received from Winna OR and it seems that this amount is indeed his the amount he initially deposited. Thank you for clarifying this to me.
I also took a look at the other accusation thread mentioned by acroman where the OP was accused of the same thing (value betting) and it seems the case got resolved and the OP got his money plus a bonus as a compensation for the inconvenience. So, there is a chance that this case will get resolved as well.