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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Cash flows from operating activities |  |  |
Net loss | $ (165,240) | $ (879,166) | $ (376,250)
Adjustments to reconcile net loss to net cash provided by operating activities: |  |  |
Depreciation and amortization | 233,940 | 246,561 | 125,292
Share-based compensation | 426,679 | 386,009 | 357,965
Unrealized loss on investments | 1,506 | 203,483 | 14,611
Asset write-down and other charges | 0 | 305,351 | 0
Amortization of deferred and prepaid sales commission costs | 138,134 | 115,184 | 74,165
Amortization of debt discount and issuance costs | 4,566 | 4,468 | 64,063
Loss (gain) on early extinguishment of debt | (53,400) | 0 | 1,736
Repayment of convertible notes attributable to debt discount | 0 | 0 | (10,131)
Reduction of operating lease right-of-use assets | 20,469 | 19,907 | 18,025
Provision for bad debt | 6,852 | 9,367 | 8,132
Other | 1,486 | 4,327 | 809
Changes in assets and liabilities: |  |  |
Accounts receivable | (57,819) | (87,843) | (64,940)
Deferred and prepaid sales commission costs | (156,734) | (235,869) | (178,358)
Prepaid expenses and other assets | 14,492 | 3,812 | 9,111
Accounts payable | (21,213) | (6,166) | 17,852
Accrued and other liabilities | 9,101 | 89,473 | 74,517
Deferred revenue | 17,681 | 33,275 | 34,227
Operating lease liabilities | (20,838) | (20,868) | (18,675)
Net cash provided by operating activities | 399,662 | 191,305 | 152,151
Cash flows from investing activities |  |  |
Purchases of property and equipment | (23,513) | (32,713) | (28,959)
Capitalized internal-use software | (52,227) | (53,730) | (43,692)
Cash paid for business combination, net of cash acquired | (14,709) | 0 | 0
Purchases of intangible assets and long-term investments | 0 | (3,990) | (324,178)
Proceeds from sale of marketable equity investments | 0 | 3,223 | 0
Net cash used in investing activities | (90,449) | (87,210) | (396,829)
Cash flows from financing activities |  |  |
Proceeds from issuance of stock in connection with stock plans | 16,687 | 15,855 | 36,721
Payments for taxes related to net share settlement of equity awards | (9,062) | (7,598) | (21,549)
Payments for repurchase of common stock | (311,088) | (99,793) | 0
Proceeds from issuance of long-term debt, net of issuance costs | 785,749 | 0 | 0
Proceeds from series A convertible preferred stock, net of issuance costs | 0 | 0 | 199,449
Payments for the repurchase of convertible notes | (820,960) | 0 | (333,632)
Repayments of principal on term loan | (10,000) | 0 | 0
Repayment of financing obligations | (5,777) | (4,815) | (4,160)
Payment for contingent consideration | (3,567) | (1,867) | (3,880)
Net cash used in financing activities | (358,018) | (98,218) | (127,051)
Effect of exchange rate changes | 1,016 | (3,055) | (962)
Net increase (decrease) in cash, cash equivalents, and restricted cash | (47,789) | 2,822 | (372,691)
Cash, cash equivalents, and restricted cash |  |  |
Beginning of year | 269,984 | 267,162 | 639,853
End of year | 222,195 | 269,984 | 267,162
Supplemental disclosure of cash flow data: |  |  |
Cash paid for interest, net of interest rate swap | 16,629 | 347 | 309
Cash paid for income taxes, net of refunds | 10,940 | 3,726 | 1,388
Non-cash investing and financing activities |  |  |
Common stock issued in connection with strategic partnership arrangement | 55,014 | 0 | 0
Common stock issued for acquisition of intangible assets | 0 | 0 | 302,600
Contingent consideration | 7,461 | 0 | 50,000
Equipment and capitalized internal-use software purchased and unpaid at period end | 3,953 | 6,808 | 7,343
Acquisition of intangibles | 3,629 | 0 | 0
Equipment acquired under financing obligations | $ 2,997 | $ 0 | $ 6,898

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