Glacier have additional fees depending on how fast you retrieve the data. Honestly I'm not sure what they are because I've never had to use it, but my impression is that these fees could be quite high.
They can be. It's possible to set a retrieval policy on your bucket either at free tier, or a fixed price point so you can control the cost of your final bill if you want to retrieve faster than the free tier
At least with Glacier I get the option of retrieving faster. Nearline is going to take more than 3 DAYS to retrieve my data if I only have 1TB stored (3MB/s).
I wrote a backup program that uses Glacier, and the retrieval policies are nearly impossible to manage and explain. But the thing I really don't get is that you can use Amazon Import to read a hard drive into Glacier, but you can't use Amazon Export to get a drive full of data back out. You can with S3.
In a disaster situation, a company is going to want hard drives sent to them next day. As others have mentioned, this isn't a money thing, it's a time issue. But it isn't available with Glacier (probably not with Google either...)
If you're willing to pay more for faster retrieval I guess you could store e.g. 5TB of random data to get a fast "base speed"- cutting those 3 days down to 12 hours.
Or use Nearline for archival data as well as disaster recovery. You won't need to transfer the archival data for normal disaster recovery scenarios, so it'll be -- for that scenario -- extra data that boosts your speed, but it's still, on its own, a useful use of the service.
