What do people like to watch on Hulu? Pretty much the same stuff they like to watch on TV, and therein lies the rub. According to the latest data from comScore, the video portal saw big spikes in unique visitors and streams in October, thanks to the start of the new TV season and the addition of ABC’s primetime shows to the Hulu mix. That has advertisers clamoring to get in on the action: Hulu’s ad inventory is nearly sold out for the fourth quarter. The good news for Hulu could be bad news for users, however. The increased viewership will only add to pressure to put some content behind a pay wall, or boost ad-loads to create more inventory.