Yes, for the opt-in ad network. Enable it at Earnings | Earn from Ads | Ads in Your Emails. Payouts occur when your balance passes USD $25 and we have a valid tax ID for you.
We do not share ad revenues from ads we place into mailings using our ad-funded services. Ad-funded services are available only for grandfathered in pre 1/1/2009 customers, or for certain trial / grace periods that last up to 30-days.