This was discussed previously on HN: https://news.ycombinator.com/item?id=36089176

It's more like $2 a TB in the larger plans. I have 5TB there and it's been working great. I use Borg Backup so the data is all encrypted. If anyone cares, Digital Ocean also makes new customers send their ID.

They don’t have great North American peering. If you happen to be there and are unlucky, you won’t be able to get a very reliable/fast connection to the server.

I tried to use one for Borg backups a few years ago and just ran into endless transient connection issues.