I think people are getting confused because of translation. An engagement in the modern Western world is not legally binding. It is really difficult to translate melcha but I think that using the word engagement or betrothal in it's place is probably not the best idea because it does not convey the serious nature of the melcha. However, those in the West that are familiar with the Bible will easily recognize this tradition because it is the same practice that is talked about throughout scripture.
There are photographs on Instagram of Majid signing a marriage contract. He is in the presence an Islamic cleric and a man who I believe to be the bride's father.
Instagram
Instagram
Hessa Beljafla's sister, Hind, just posted a photo on Instagram that says "Hessa Bride".
Instagram