There is no incentive pay. Per FICO scoring, a paid CA is just as bad as an unpaid CA. Doesn't matter if you owe $0 to $10,000, the damage is the same. Sometimes it is worse if the CA updates the TL to change the DOLA or "updated" date. FICO will often read the CA as a newer CA and drop the score. These dates almost always change when you pay them.
YMMV based on lender. I've read quite a bit over at the Mortgage board and many lenders don't require you to pay a CA and some actually discourage it, probably because of the potial for a score drop. Of course, this is why we recommend the DV-PFD route. If they accept and a payment is made, then the CA will remove it resulting in a score gain.