Hunter classes call for shaped pads, which have no room for a logo. If you are showing in a local, unrated hunter class using a square pad, I would imagine that plain, unmarked white would be the way to go.
If you're doing the hunters, please use a shaped fleece pad or a white fleece halfpad and not a quilted pad.
If you're doing jumpers, then yeah I guess you could, but IMO I think they're a little tacky to show in. We can already see the brand on your horse's butt, why do you need to further prove that the horse is a Real Legitimate Breed? Just my opinion...
I've heard there's more to life than an FEI tent and hotel rooms, so I'm trying it.