wanta / wanna

[Mai Kuha]

Maybe the reason we haven't discussed this is that it's uninteresting or too
annoying, but here goes just in case:

In a recent Fanta ad on TV, young women dance and chant: "Wanta Fanta? Don't
you wanna?" I wonder:

how long "wanta" will be spelled "wanta" (the text is shown in the ad) given
that "wanta" and "wanna" are homophones;

whether it is still possible to pronounce "want a" with /t/;

how come the manufacturers don't seem to fear losing the /t/ in "Fanta"
(just kidding)...

-Mai