I am not so sure that exchanges can get stake weighted inflation. They should not power up any Steems, for the case that their holders want to withdraw.
I really found this to be great, as this is a brilliant way to reward holders at the expense of traders. I liked it when stake weighted inflation at the beginning was like 5000%... Each day a trader held their Steem costed him about 1%. That was awesome. I hate short term traders.