TripAdvisor's push of its Instant Book feature, which lets its users book hotels quickly right on its site, contributed $10 million of the company's $15 million revenue miss, according to Cowen & Co. analyst Kevin Kopelman. TripAdvisor management also reduced its 2015 revenue guidance to the high teens from low to mid-20s and its earnings before interest, taxes, depreciation and amortization (EBIDTA) growth to "slightly negative," according to Kopelman. TripAdvisor is eliminating its TV advertising spend, he wrote. Click-based ad revenue was hurt by lower cost-per-click pricing vs. last quarter, which may be due to increased industry consolidation, RBC Capital Markets analyst Mark Mahaney wrote in a research note. Get the full story at Read also "TripAdvisor trips over itself as growth falls short"