I just created a line graph in order to decide whether I want to stay at black level, or buy up to TV Star.
Silver takes 153 winning bets to start earning more than you would have at Black Level.
153 bets at Black Level would be 6120T. 153 bets at Silver Level would be 6426T (but deduct 300T from buying Silver). Therefore after 153 bets at Black, you would make 6120T and at silver you would make 6126T (and make a 4T profit from every bet after that).
Gold takes 178 winning bets to start earning more than you would have at Black Level.
178 bets at Black Level would be 7120T. 178 bets at Gold Level would be 7832T (but deduct 700T from buying Silver and Gold). Therefore after 178 bets at Black, you would make 7120T and at gold you would make 7132T. (and start making a 6T profit from every bet after that)
The trend continues for the rest of the colour levels, but for the record TV Star takes 284 Bets to start earning more T's than you would have at Black Level.
So for people levelling up to earn more from Bets, staying at Black Level is the smartest thing to do. If you're levelling up to play stars, and have more impact when you +/- blogs, then this blog is irrelevant to you