The most clear distinction between the two searched terms can be made by describing the non-revenue sales credit. The ONLY target of the non-revenue sales credit is to boost sales. The salesperson/company doesn´t want to get interests paid to the company only to sale as much products/cars as possible.

Second target maybe the goal of reducing discounts and rebates by offering the advanateg of a non-revenue sales credit. Very often used ist the so called "Null-Prozent-Finanzierung".

The two examples (one from a German news magazine) will give you a good impression of how this works.

Therefore the revenue sales credit is any other credit with the aim of boosting sales. In that case I would use "verzinste Absatzfinanzierung". This combines the fact that interest is gained "verzinst" with the term of the sales credit "Absatzfinanzierung".

Hope this helps.