Well, to disagree: She-Hulk sold horribly and has had what, 4 reboots, 5? Spider-Girl got 3 reboots, 4 if you expand out of the original version, and a longer run on often very low sales, especially relative to the market. THey got chances because those in power with Marvel backed them up, and gave them a lot of time and chances to succeed even if fans, especially with She-Hulk, turned a blind eye. To whit: You can't even get She-Hulk graphic novels through the library system here (But AF and EXcalibur, sure).