I get that there are less savvy people who would want something like this because they can't code their own thing or don't have anything to run a website which would do this. However, $10 (lets be fair, if people need files under 20mb only, they are just going to use email) seems quite expensive for a simple service like this.
What I mean to say is, this seems like the kind of thing people only would use occasionally, to ask for files from people, right? $10/month seems quite excessive for that. Feel free to prove me wrong though, if you've already thought about that. (I'm just curious because I know that I couldn't justify $10 per month personally).
For the free plan, you state on the website that it has a 20MB file limit, what is the total bandwidth/transfer limit though?
Also, how does it handle malicious files? It shouldn't people to upload potentially malicious files onto the user's cloud, which is basically directly onto their computers.