There still seems to be a misconception about what Aliexpress is. It's not one seller, but a version of eBay(for small businesses), so while some Butterfly rubbers might be genuine, others won't be. It really depends on the seller.
Also, the rating and feedback in these cases are mostly worthless, unless they are very high. I've seen people satisfied with stuff, that was definitely fake.
Usually, when it comes to table tennis equipment, I think it's not worth it. Good for electronics like cell phones though.