I think you did a good job with teasing. The clips are short and they have to click your sponsor to see the cum shot. The only thing I can think of is cut down your bandwidth until you get the format right for you to make money. Not so many clips and add a text link or two maybe even another banner (although I like the clean design so I wouldn't over do it
) to give them more chances to buy. I'm still surprised though that you didn't get any sign ups. I haven't a clue why not. Maybe more text by your banner to make sure they know they can see the rest at your sponsor? All in all a good site.