Now, if this member reduces the delegation or the hive equivalent, just to receive a 50% upvote, he/she will receive it twice a day.

That is not how the Vote Accruals work. If you post after only half a day then you only get half that days allocation. It is not open to abuse the way you describe.

We are very focused on preventing abuse and will have our eyes open. If you see any abuse please let us know.