One of the most common pre-sales questions we get at rsync.net is:

"Why should I pay a per gigabyte rate for storage when these other providers are offering unlimited storage for a low flat rate?"

The short answer is: paying a flat rate for unlimited storage, or transfer, pits you against your provider in an antagonistic relationship. This is not the kind of relationship you want to have with someone providing critical functions.

Now for the long answer...