I believe it will incentivize trading, because it will be easier for someone to obtain HBD to trade when someone is trying to pump the price of HBD beyond a dollar. Whether that happens on the internal exchange or on an external exchange will likely be determined by where the price pump is happening (generally in the past they've happened on external exchanges).
So my guess is it won't change the situation much for internal trading, except to the extent that it makes it easier for someone to create more HBD when the supply goes low, without having to wait till the reward mechanism creates more.