MediaPost: Advertising market softness and general audience under-delivery issues contributed to weak ad sales growth in the second quarter at Scripps Networks Interactive. Ad revenue climbed 1.4% to $496.9 million — a bit better than some forecasts. Todd Juenger, senior analyst of Bernstein Research, had expected a 0.5% hike. Still, he said, overall “TV advertising demand is decidedly decelerating.” Scripps’ two big networks went in the opposite direction in ratings. HGTV witnessed a 14% gain among 18-49 prime-time viewers, while Food Network lost 8%.