I am interested in giving away one of my eBooks for free in order to garner interest, readers, and reviews.

I know Smashwords offers the free option but I don't like the way the eBooks show when formatted by them.

Another option is going KDP select via Amazon, then you can offer it free for 5 days out of every 90 days.

I was wondering if anyone has used Rafflecopter, pros and cons?

Has anyone just simply emailed their Kindle or epub file out to interested parties? Can those files be protected? Pros and cons?

Just looking for the best option available. Thanks for any insight on this.