I haven’t ordered much from Amazon in the past due to being in Australia. Amazon shipping is $10 per shipment + $5 per item, so most of the time I’m better off getting items through Paizo or Noble Knight Games.
However, I think this is the first time I’ve had a damaged item (and minor damage at that). Normally they’ve packed the books with air bags or bubble wrap to protect them and stop things moving around. This is the first time that there was no extra protection. I wonder if, like others have said, they were in a rush to get the books out the door on the release date, so decided to skip that step.
Despite my damage, I think I’ll still order from Amazon again for the MM and DMG. If they end up too damaged I’ll contact Amazon about it as, based on other posters’ experiences, they seem to be pretty good and replacing any damaged items. Australia Post also tends to be pretty good with not trashing parcels, which definitely helps.