>>1039790I think it really depends. For example, Sayaka's feelings for Kamijou were the same throughout the entire series. Her feelings never changed, and she never changed either.
Sayaka's feelings for a boy didn't prevent people to start shipping KyouSaya. So, I don't see how Sayaka is any more straight after ep12, since her feelings are pretty much the same, and her situation with Kyouko has barely changed.
So, I don't see why people are bringing up Sayaka's sexuality now. People began shipping Kyouko and Sayaka, because of Kyouko's actions in ep9, and because of Sayaka's sad situation and the desire to see her happy.