Personalized bitcoin addresses for branding? It reminds me of something. Hmm, won't something similar happen, as it did with domain names in the early days of the Internet? When all cool titles will have owners and will be sold for a lot of money. Of course, this is complicated by the presence of private keys and the wide variety of public addresses due to the large number of characters, which allows you to have many addresses with the same brand name.
But since in practice you have limited computational resource, people only can generate few unique character while the rest still different which create so many possibility such as "1Amazon1...", "1Amazon2...", "1AmazonZ..." and so many more possible address.
I also have a question. Isn't it easier to hack into such addresses containing unique brand names in a public address?
No, unless the private key was generated in insecure manner (e.g. use weak RNG or sequentially brute force from private key "1").