Yea, that's not what my accountant said. Regardless, I would confirm whatever information you receive here with a tax professional as it's your skin on the line at the end of the day.
It definitely puts you above others who don't have it. I paid to do it and the only time I get denied is phone shops but those always go quickest.
No, I see you've been asking this question and not gotten an answer. I would contact the people from the shopping scout training or the MSP directly. If you already have a shop assigned you should see a section that says, "If you have questions, please contact the responsible MSP directly:" and has the name, number, and email of whoever you can contact with questions about the shop.
I recently did a shop where I had to record audio. I downloaded an app called Voice Recorder the icon is red background with white voice lines. It worked out great as my shop was accepted. If you happen to have a Samsung watch, you can also record audio on there. I would also throw in this tip, place your phone upside down in an outside pocket of your purse so the mic is facing up and able to catch all audio.
Ohh yes those are the Costco audit shops, they are legit but very time consuming and difficult, good luck!
If it helps, I JUST NOW got my Grammarian badge today after 28 successful shops on here.