I'm speaking from my experience of losing access to my YouTube account (same username as I have on this forum) due to having used my gmail address to sign up. G

I'm speaking from my experience of losing access to my YouTube account (same username as I have on this forum) due to having used my gmail address to sign up. Google later started linking everything to plus and somehow my gmail account spawned a new YouTube profile that clobbered my old one. I spent many, many hours over many years trying to get access to my old account again and never did. Email is pretty sticky, so I'm stuck relying on Google for it, but after this experience I'm overwhelmingly unlikely to ever rely on Google for another service I care about. I've also had some significant technical issues with other Google services where there is no support (e.g. the talk plugin for Firefox simply won't install and the troubleshooting page suggests using Chrome), but losing my YouTube account is something I'll never forget. Every experience I've ever had with Amazon's customer service has been fantastic. I wouldn't want to be one of their suppliers but as a customer, they're great.