Cost of Revenue (exclusive of depreciation and amortization shown below)
Cost of revenue increased by $3.0 million, or 11%, from $26.5 million in the three months ended September 30, 2023 to $29.5 million in the three months ended September 30, 2024. The increase was primarily due to growth in Activation revenue, leading to higher partner costs from revenue-sharing arrangements. These were partially offset by savings from eliminating duplicative costs as the Company migrated to cloud services for better scale and flexibility, along with efficiencies gained from DV’s AI-powered video classification technology. Cost of revenue increased by $5.6 million, or 7%, from $76.6 million in the nine months ended September 30, 2023 to $82.2 million in the nine months ended September 30, 2024. The increase was primarily due to continued investments in cloud services to provide scale and flexibility necessary to support future growth, as well as growth in Activation revenue which drove increases in partner costs from revenue-sharing arrangements.
Product Development Expenses
Product development expenses increased by $7.0 million, or 22%, from $32.3 million in the three months ended September 30, 2023 to $39.3 million in the three months ended September 30, 2024. The increase was primarily due to an increase in personnel costs, including stock-based compensation, of $5.9 million, and an increase in third-party software costs and professional fees of $1.2 million primarily to support product development efforts. Product development expenses increased by $22.7 million, or 24%, from $92.8 million in the nine months ended September 30, 2023 to $115.5 million in the nine months ended September 30, 2024. The increase was primarily due to an increase in personnel costs, including stock-based compensation, of $18.8 million, and an increase in third-party software costs and professional fees of $4.0 million primarily to support product development efforts.
Sales, Marketing and Customer Support Expenses
Sales, marketing and customer support expenses increased by $7.6 million, or 23%, from $33.0 million in the three months ended September 30, 2023 to $40.5 million in the three months ended September 30, 2024. The increase was primarily due to an increase in personnel costs, including stock-based compensation and sales commissions, of $6.0 million, and an increase in personnel travel and entertainment expenses to support marketing and sales activities of $0.4 million. Sales, marketing and customer support expenses increased by $33.0 million, or 37%, from $90.2 million in the nine months ended September 30, 2023 to $123.3 million in the nine months ended September 30, 2024. The increase was primarily due to an increase in personnel costs, including stock-based compensation and sales commissions, of $25.6 million, an increase in marketing activities, including advertising, promotions, events and other activities of $1.1 million, and an increase in personnel travel and entertainment expenses to support marketing and sales activities of $2.5 million.
General and Administrative Expenses
General and administrative expenses decreased by $0.2 million, or 1%, from $23.3 million in the three months ended September 30, 2023 to $23.0 million in the three months ended September 30, 2024. The decrease was primarily due to a reduction in bad debt expenses of $1.1 million, a reduction in acquisition related costs of $0.9 million, and a reduction in general corporate insurance costs of $0.1 million, partially offset by an increase in personnel costs, including stock-based compensation, of $2.1 million. General and administrative expenses increased by $5.0 million, or 8%, from $63.2 million in the nine months ended September 30, 2023 to $68.2 million in the nine months ended September 30, 2024. The increase was primarily due to an increase in personnel costs, including stock-based compensation, of $8.5 million, and an increase in third party professional fees of $0.3 million, partially offset by a reduction in bad debt expenses of $3.4 million, primarily related to a reserve established in connection with outstanding amounts owed to the Company by its activation partner, MediaMath Holdings, Inc., which filed for Chapter 11 bankruptcy protection on June 30, 2023, and a reduction in general corporate insurance costs of $1.1 million.