Ffolio is happy to promote content from any publishers.
We need to make sure that the e-book has an ISBN that is different from the physical book, and that there is a different ISBN for each format.
Metadata will need to be provided for the book, cover and file adapted for the media.
Selling e-books has become a more popular medium for selling books, but only folio gives traditional bookstores an element of sales.
If you want to consider ffolio as your wider e-book distributor, there will be other considerations, such as which media you want to use (Amazon uses a different MOBI format) and whether you want to lend to libraries.