Even if you can only do it for 50% of members because of whatever logistical problem, it's worth it. Although it seems it'd be simple enough to email publishers and offer to buy X number of copies of an ebook in the context of a book club.
The best way to get a book club off the ground is to make sure everyone has the book in hand before the discussion starts. "First book on us" is a great way to build momentum, and it lets people know that you're serious about the project.
I wouldn't do any of this. If I can't put my info in online and a few days later, the book shows up at my house, I definitely will not do it.
> The best way to get a book club off the ground is to make sure everyone has the book in hand before the discussion starts.
Worth noting that none of what you just described actually assures this. Giving someone currency to buy a book isn't the same as buying them the book. I already have the ability to buy a book.