From their most recent SEC filing:
"As of March 31, 2023, our customer deposit balance includes approximately $0.5 billion of unredeemed FCCs. Given the lack of comparable historical experience of FCC redemptions, as of March 31, 2023 we are unable to estimate the number of FCCs that may not be used in future periods and get recognized as breakage. "
That figure is the same as last quarter, so virtually no FCC used during the quarter. The last time the FCC was bigger, at $.6B, was a year ago.