As a user of Backblaze (and no connection to them), for the price their service is unbelievable. They have saved me several times when I've deleted or overwritten a file, and the backup 'just works' - sits in the background and keeps things safe. They look after, urmm, a little over a 1TB of data for me. For <$5 month (I pay two-yearly). Show me -anywhere- else that even comes close.
Sure the encryption requires an amount of trust in them, but I use a local passphrase to provide an additional level, and really I don't store anything particularly sensitive (no IP, no work) on their service.
As far as I'm concerned, if they want to look after my collection of photos and videos of my kids growing up in a way that I can get them back if my house explodes, I'm happy. As is my wife, which is almost more important.