You're very much more expensive in the brackets below 10TB amazon takes around 10cent, you up to 24. Break even is in the bracket between 10 and 49 TB but after that amazon again undercuts you with 7cent/GB/month. With you I have to pay in advance and not by monthly usage - at least that's how I read your product page.

Now there may or may not be other reasons to choose your service (data center in switzerland is appealing) but according to your pricing page, you're only cheaper in a very narrow window.