Well, I subscribed to the lowest BookFusion tier to start with – $19 per year isn't really all that much. If skillachie keeps improving the app at the current rate, I'll be happy to subscribe to a higher tier in future, perhaps, if only to support the app's development.
(The other two tiers are $48 and $96 annually. The only real difference is storage space: 5 GB versus 20 GB versus 100 GB. I currently only use 317 MB out of the 5 GB.)
I sync my books via Dropbox, so don't really need storage space directly or even virtually within an e-reader app.
I only need to keep those books in sync that I
currently read. I used to read 7 books simultaneously, but have now increased that to reading 32 books at the same time – in 21 different languages. Some are EPUBs, others (where no quality EPUB is available) only PDFs, and some (worst of all, I guess) are only available online, such as through the Internet Archive (archive.org) online lending library (those are typically scanned books).
So, as can be seen, even BookFusion can't be a "one-stop solution" for me – unless, skillachie, you also incorporate a browser window within BookFusion!
The important thing for me is that, once I run out of storage space in BookFusion, there should be an option to export my
annotations reliably. And I think we've been working on that with skillachie in the MobileRead threads dedicated to BookFusion:
here and
here and
here. That is where Dion's and everyone else's feedback to BookFusion would no doubt be highly welcome, so that we're not hopelessly off-topic here in the Marvin section.
(I apologize to skillachie I haven't had time, since last summer, to look at the BookFusion threads, but will do so as soon as time permits.)