Verdict
Selling directly online? Choose CPA. Does your funnel include a quote, trial or call step? Choose CPL with strict quality criteria and a validation period.
When CPA works
CPA is transparent: you pay a percentage or fixed amount per validated sale and know your cost per order exactly.
For shops with a short orientation phase this is almost always the best model.
When CPL works
For subscriptions, B2B services or expensive purchases the sale can land weeks after the click. Publishers do not want to wait for a commission that may never come.
With CPL you pay per enquiry, demo or trial account and keep publishers motivated.
The risk of CPL
Lead quality is the whole game. Without clear criteria and a rejection process you pay for forms that never convert.
Define what counts as a valid lead, how long validation may take and what rejection rate is acceptable.
Hybrid settlement
A common middle ground is a small amount per qualified lead plus a bonus on the eventual sale.
That shares the risk and rewards publishers who deliver quality instead of volume.