Honestly, I don't see the point of this post, Guy. Whether 20 people on here all say, "HELL YES! WE WANT MANYVIDS GIFT CERTIFICATES!" or 20 people say, "No way, dude, I just buy my own porn," it doesn't change the fact that Manyvids is not owned by anyone one here (as far as I know). So your question is moot.
Also, since MV is mainly a place to buy content/items from models, who would be
buying these GCs? And whom would they be for? From one member to another? I doubt that MV would make a lot of money that way. In the cam world, most gift certificates/wishlists/etc are useful as an extra tool to
spoil your favorite camgirl. But most girls either don't want other girls' content OR we just trade it amongst ourselves for free.* So once again, your question is moot.
*The list of perks for being a camgirl grows longer everyday.