Great questions, Antonio. I've just deployed an update to the front page at http://www.softcover.io/ answering some of them, but for convenience I'll answer them below as well.
1. Am I allowed to sell the files elsewhere? For example, sell the .mobi file on Amazon Kindle and publish a printed version via CreateSpace.
Yes, you retain copyright on everything you make and can do anything you want with the files. They get built on your system by Softcover's open-source toolchain, so you have complete control.
2. Are the files watermarked at all with Softcover's branding?
No, the books have no Softcover branding. The online version has an inconspicuous Softcover-branded footer by default, but even that can be removed with a simple config setting, as described in the manual (http://manual.softcover.io/book/marketing#additional_informa...).
3. Is this open to authors everywhere or are there restrictions?
Softcover is open to anyone, and there are no restrictions.
4. Will this handle sale taxes for authors? I'm a Canadian author with a PST/GST account, will I able to collect that from Canadian customers?
I don't know about this one. If you join the [Softcover Google Group](https://groups.google.com/forum/#!forum/softcover-publishing), I'll introduce you to my cofounder Nick Merwin, who is in charge of stuff like this. If we don't currently support collecting Canadian sales tax, we might be able to add it.
1. Am I allowed to sell the files elsewhere? For example, sell the .mobi file on Amazon Kindle and publish a printed version via CreateSpace.
Yes, you retain copyright on everything you make and can do anything you want with the files. They get built on your system by Softcover's open-source toolchain, so you have complete control.
2. Are the files watermarked at all with Softcover's branding?
No, the books have no Softcover branding. The online version has an inconspicuous Softcover-branded footer by default, but even that can be removed with a simple config setting, as described in the manual (http://manual.softcover.io/book/marketing#additional_informa...).
3. Is this open to authors everywhere or are there restrictions?
Softcover is open to anyone, and there are no restrictions.
4. Will this handle sale taxes for authors? I'm a Canadian author with a PST/GST account, will I able to collect that from Canadian customers?
I don't know about this one. If you join the [Softcover Google Group](https://groups.google.com/forum/#!forum/softcover-publishing), I'll introduce you to my cofounder Nick Merwin, who is in charge of stuff like this. If we don't currently support collecting Canadian sales tax, we might be able to add it.