You're probably going to want to give someone else a vouch copy before people even start buying your ebook lol not vouch AFTER someone buys it. I would suggest giving a vouch copy to someone that's over at least 1,337 or 2k posts. They're the ones that are, I guess, considered more trustworthy isntead of giving it to anyone with less than 1k posts just begging for a vouch copy.