DSPs reach less than 25% of the $80 billion US TV market

The over-reliance on programmatic DSPs creates a strategic bottleneck, limiting advertisers to a narrow slice of available inventory while incurring significant intermediary fees. For the streaming ecosystem, this highlights a growing divergence between the automated 'open web' model and the concentrated reality of premium TV, where 90% of scale is held by a few gatekeepers. As streaming captures nearly half of all US viewing time, the market is shifting toward 'convergent' infrastructure that bypasses traditional bidstreams. Success now depends on unified tools that can bridge the $68 billion divide between traditional upfront relationships and automated streaming auctions. Watch for publisher adoption rates of direct-connect tools like Upstream to determine if the 'ad tech tax' will face a permanent structural correction.

The push for direct supply paths comes as streaming viewership hit a record 47.5% share of total US television usage in December 2025, according to Nielsen's The Gauge. This surge was anchored by high-profile live events, including NFL games on Netflix and Prime Video, which together commanded 22.5% of total TV usage on Christmas Day. Per Media Dynamics in August 2025, streaming ad sales in the upfront market grew by $5 billion year-over-year, yet linear TV still retained the largest share of upfront commitments at $17.8 billion despite a 3.2% decline. This concentration of viewership around live sports and major events reinforces the argument that premium inventory is increasingly sold through direct, reserved channels rather than open auctions.

Simultaneously, the integrity of programmatic supply remains under scrutiny. Pixalate reported in March 2026 that the global invalid traffic (IVT) rate for CTV reached 21% in Q4 2025, with North American rates specifically hitting 19% for programmatic impressions. While the IAB projects overall US ad spend to rise 9.5% in 2026, driven by a 13.8% increase in CTV, the industry is seeing a pivot toward accountability. According to Teads in February 2026, over 53% of marketing decision-makers indicated they would further increase CTV investment if they had better ROI measurement, suggesting that the current programmatic infrastructure is struggling to deliver the transparency required for legacy TV budgets to fully transition.