[samwillis]

Similar position here, although we recently launched a new product that so far is only advertised through Facebook. Based on that we believe Facebook can only attribute 40-50% of conversion events.

Facebook is going to have to do something drastic to improve this situation, I suspect they are going to push advertisers to fold their store/checkout into Facebook so a customer never leaves the app. It will be the only way to track all conversion events.

[Tagbert]

Then I expect you will lose more customers who object to that practice.