SEGMENTS - Revenue by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Adjusted Contribution	$ 158,626	$ 143,035	$ 129,628
Plus: FI Share and other third-party costs	150,578	155,507	137,488
Revenues	309,204	298,542	267,116
Cardlytics Direct
Segment Reporting Information [Line Items]
Adjusted Contribution	135,518	122,981	121,675
Plus: FI Share and other third-party costs	149,907	154,204	137,079
Revenues	285,425	277,185	258,754
Bridg Acquisition
Segment Reporting Information [Line Items]
Adjusted Contribution	23,108	20,054	7,953
Plus: FI Share and other third-party costs	671	1,303	409
Revenues	$ 23,779	$ 21,357	$ 8,362