said by bt:Not only that, but hulu isn't really intended for first run viewing. It's more like how reruns are monetized.
In general, it's not that weird. "Free" isn't exactly what those shows are - they're ad supported. Delivering those shows via devices that aren't showing the on-page advertisements would hurt Hulu's (likely razor thin) profit margins.
This specific case is definitely weird though, because it's just another full browser - ads and all.