At the moment this is purely hearsay!
It seems strange that something so important to the game would just be casually mentioned to just one houseguest in the DR.
With all the pretending McRae won HOH thing and Amanda seemingly having pretty much her own agenda it could very well be something that she just said for her own reason, to deflect something someone else had said or any number of reasons.
I'll believe it when it's officially announced.
I agree also that it's a shame that the same person can win it week after week. The viewers aren't going to vote for one of the racists to be MVP anyway so it would make it much more interesting if other people were getting it.
At the moment Aaryan and co probably think that if it wasn't for Elissa getting it every week one of them would get it but if different people were getting it every week it probably would have started to click by now that none of that lot are ever winning MVP.