For a year on average they did $500,000 in originations per week. Whenever they started to dip below that they ran some kind of promotion, like the 1% on all bids promotion (they didn't try that again) or the 2% one day only bonus, which they extended for a couple days IIRC. Not a whole lot of bonus giving during that year, but nevertheless some and it was very targeted, coming at times when originations were waning.
At least that's how it appeared to me.