As I understand it, we all get an ebook-only option. It’s set at $10 for the campaign (which I suspect would end up being more expensive than your ebook) because it’s investing in the cost of producing the novella.
Matt Sobin wrote a novella which is now in production, and his ebook is $3.99.
I think whenever you switch over to funding, the ebook and print options will appear just as they appear on every other funding campaign. Hope that helps!
At the funding stage, the ebook price is set at 50% of the printed book price. If you choose the hardcover option, the print book will be set at $30 and the ebook would be set at $15 ... even though the ebooks do not actually differ between the hardcover and paperback options.