@DWondermeant - I don't have the official wording of the rebate benefit (I should note that this is the old IHG card with the rebate not the new one available now), but I believe it just considers redemption. Is it truly their intent to offer it even on transfers to airlines? I can't say but it appears to be coded that way.
Also, for anyone looking into this, I should also note that the points took 7 days to transfer to Asia Miles. They note a transfer date of 7 days later, so take that transfer time into consideration when taking advantage of this bonus. I believe you would need to transfer points out of IHG no later than 6/23 if you want to participate in this, though it might be safer to do it a few days before that if you want to give yourself a little cushion in case the transfer takes longer for you.
Lastly, I have not yet received the 50% bonus from Cathay yet. I am guessing the 50% bonus will be awarded after the promotion ends (and thus clearly after the time the award chart changes). Don't make a transfer assuming that all points, including the bonus, will appear immediately.