I keep reading in multiple blogs about the Bus Plat allowing 2 guests for priority pass lounges. However, every time I look at the official benefits on the AMEX website or in invitations AMEX sends me to apply, it states no free guests.

What is the real policy?

7 Priority Pass Select
These Terms and Conditions govern Business Platinum Card Members' participation in and use of the Priority Pass™ Select program. Priority Pass is an independent airport lounge access program. By enrolling in Priority Pass Select, you agree that you will be responsible for all accompanying guest visits and will be automatically charged $27 per guest to your Business Platinum Card® from American Express after you have signed for the visit and it has been reported to Priority Pass by the participating lounge