Poor genetic stability/inadequate breeding techniques/genetic mutation are all likely causes for this weird plant, and probably a combination of all three issues.
Unfortunately, plants like this are most likely never to grow proper flowers and unless she shows signs of becoming "normal", keeping her going is a question of whether or not you want to see what happens and if you have enough space/time/patience to see what she ends up doing.
In my experience, plants like this end up in the butter making pile, as they will not give anything worth keeping and are usually pulled out due to being a waste of time. If you have the space and inclination to see what happens, plants like this can be worth keeping for hard times or given away to someone who is in desperate need. Strangely, they will sometimes grow trichome heavy, killer flowers that just look weird, but that is a very rare occurrence.
Cheers, Organoman.