For Supernovas, the $1600 bonus for 100K FPP offers almost the same x-rate as satty tickets, that's why the three above posters exchange for cash. At levels lower than Supernova, playing a satty (Stars give T$ after you play one satty and unregister from the tourney you qualified to, and then you can trade the T$ for real $ with a typically 3% vig, do I take it right?) is more profitable for those whose satty ROI is positive, however, there's also a small opportunity cost of not playing a cash table instead.
Disclaimer: that's what I've figured out from Stars' site, I remain unregistered there