If it doesn’t have any TDF or TKTS signage/logos, it’s not an affiliate and, personally, I wouldn’t trust it. They sometimes have discounted tickets, but it would be like buying your seats off of Broadway.com - third party, higher price than normal because of junk fees, uncertainty of your seat location, and (doesn’t apply to the website but) no protection if the event is cancelled or postponed.
Like every Broadway show mentions, always stick to the designated sellers.
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www.ebay.com/usr/missvirginiahamm