For s3 iDrive e2 is cheaper. It costs 4$ per month, if you pay monthly and down to ca 3$, if you pay yearly.
The egress policy is mostly the same as backblaze. You get 3 times the storage you pay for. With backblaze you get 3 times the average amount of data you have stored.
1000 down and 100 up for ca 40 euro a month