Performance maybe a little bit, but IIRC you, as the owner of the bucket, pay for bandwidth out.
Putting it being a CDN protects you (at least a little bit) from the possibility of a huge bandwidth bill at the end of the month if someone realizes they can attack your wallet directly by trying to ddos your site.
Putting it being a CDN protects you (at least a little bit) from the possibility of a huge bandwidth bill at the end of the month if someone realizes they can attack your wallet directly by trying to ddos your site.