People invariably get bored of reality TV shows after the first few seasons. They are a great way to pad up a network's schedule, but when a network relies too heavily on them, eventually people start demanding scripted shows again (case in point: NBC). Prison Break just had the plug pulled on it, and with Dollhouse slipping into mediocre-ratings-land in just its first season, keeping TSCC around doesn't necessarily look unattractive to them.
The show survived in the Friday Slot of Death in an experiment by Fox that did not go according to plan. They wanted to revive "Sci-Fi Fridays" with Dollhouse, but it turned out to be a bomb, and TSCC's ratings were hurt from it. Fox may be stupid sometimes, but they're hopefully smart enough to realize the cause-and-effect nature of what happened. Fox moved TSCC to TV's worst night (in terms of viewers), and wanted to see how many people would follow the show. It turns out that the show's hardcore fanbase is about 3.5 million strong, plus another million in DVR. The rest of the show's audience was casual live viewers who watched it on Mondays, but stopped watching during football season and when the show moved to Friday.
Point is, the show needs a better night. If Fox had paired the show with American Idol last fall when Season 2 started, this show would be Fox's answer to Lost right now. Unfortunately though, the show had a bad night, and then, a terrible night, and now the show's viewer base has bottomed out at about 4.5 million viewers. If that's rock bottom for the show, it's actually not that bad, but Fox HAS to do something to get ratings up if they plan on renewing it.
My suggestion? Warner Bros. should sell reruns of the show to all the cable networks that cater to the demographics the show could potentially reach-- specifically, Sci-Fi channel and ABC Family, and then air them throughout the summer. They might have to sell the reruns at a discounted rate, but if it gets people to tune into the new season on Fox it will be worth it, so hopefully that is something Warner Bros. is using in their negotiations with Fox for a new season. They need to get the people who stopped watching caught up on the story, and they need to get people who were unaware of how good the show is to watch, and rerunning the show on a network that caters to sci-fi and a network that caters to family dramas would be the best way to do it. If this creates enough awareness for the show, it would justify Fox moving TSCC to the coveted Tuesday 9:00 PM slot.