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Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock-Based Compensation Expense
Stock-based compensation expense recorded in the condensed consolidated statements of operations was as follows (in thousands):
Three Months Ended
September 30,
Nine Months Ended
September 30,
2023202220232022
Platform operations$5,729 $3,517 $14,642 $14,254 
Sales and marketing21,116 14,861 54,039 48,718 
Technology and development43,727 22,641 91,283 67,258 
General and administrative69,061 79,984 210,222 240,881 
Total$139,633 $121,003 $370,186 $371,111 
Summary of Stock Option Activity
The following summarizes stock option activity:
Shares
Under Options
(in thousands)
Weighted-
Average
Exercise Price
Outstanding as of December 31, 2022
15,418$19.82 
Granted2,80662.21 
Exercised(4,414)10.28 
Expired/Forfeited/Cancelled(744)56.02 
Outstanding as of September 30, 2023
13,066$30.09 
Exercisable as of September 30, 2023
9,424$18.37 
Summary of Restricted Stock Activity
The following summarizes restricted stock activity:
Shares
(in thousands)
Weighted-
Average
Grant Date
Fair Value
Unvested as of December 31, 2022
8,747 $57.41 
Granted6,404 62.69 
Vested(2,473)54.95 
Forfeited/Cancelled(1,090)57.60 
Unvested as of September 30, 2023
11,588 $60.84