Well, you know, people may not even have a different comic =) Not like you wake up one day with a plot for a whole comic in your mind, right? I know I don't at least.
There are different kind of people and comic makers, for many making any kind of plot is hard and no one can say whether your next comic will become successful. Not saying that one shouldn't try doing something else sometime, but it's not that easy too 
Also, silence from 1 not-so-popular-site-most-people-never-heard-of is really nothing, it's not like Bobbyjoe tried Marvel or any other really popular comic publisher and they said no to him.