It would just be distributed evenly with everyone else. Say if I originally was taking 10% of the total rewards with UTXOweight=100 but since my UTXOweight is 50 now, I would be only taking 5% and the other 5% would be distributed among the other researchers.
Yes, that's exactly my point. So - for simplicities sake - let's say we have 3 researchers, A has mag 500, B has mag 300, C has mag 200. Now let's say their combined RAC is 1000, meaning mag=rac. The total payout per superblock shall be 1000 BBP (simplicity...). At their full utxoweight they would get A: 500, B: 300, C: 200 BBP. Now A only has utxo=50%. Does that mean he gets 250, B gets 450, C gets 300?
Going further, if all 3 guys are at 50%, their payout would just be the same, namely 500, 300, 200, right?
Hmm.. come to think of it, maybe it's not "unfair" at all, because of the distribution permanently adjusting itself over all user...