Here’s what consumers have asked with answers from Pubby staff and previous consumers.
Takes ages to respond and then very rude and short with replies. They don't act like they want to keep you as a customer but talk as if they're not bothered.
Pubby is an actual company but scammy in their practice and I wouldn't be surprised if it is a cover for a scam. The service is horrible and prevents you from moving forward, keeping you locked into the service. I canceled during my trial because of the crappy service. They take longer than four hours to "approve" your book. They hold you up from getting reviews, deactivating the button that lets you request reviews, even after you have reviewed books. They claim not to know if you have written reviews and ask you to contact support to reactivate the button on your account, but there is no real customer support. So, essentially, they deactivate your account so you cannot get reviews while they take your money and get reviews from you. I say don't bother.
You can charge a small fee. You will get more reviews if you offer a free read via pdf, epub or via kindle unlimited.