Rockerbox is de-duplicating all conversions across all your marketing channels, while Facebook takes full credit for all conversions where it was a touchpoint. For a path such as: Criteo Display > Facebook > Paid Search > Organic Search
Facebook platform = 1 conversion
RB First Touch = 0
RB Last Touch = 0
RB Multitouch = fractional (ex .3)
As such - conversions, revenue, and by extension ROAS will look lower in Rockerbox than what Facebook self-reports
To more closely compare in-platform Facebook purchases to Facebook credit in Rockerbox, compare total Facebook touchpoints.
You can do this by pulling an MTA Report of user-level log files, or by filtering for Facebook within the Customers > Paths view of the UI.
Updated about 1 year ago