This has been discussed before in regards to the Subway: I have a question about my pokemon stop - #15 by SweetnSassy37
In addition to what the conversation in the Spring discussed, I think it may have been accidentally accepted by Niantic’s Machine Learning (ML). Upon human review it was then retracted
Is this confusing? Yes
Is it the right outcome? Most likely, yes
If you can share your original nomination from your Wayfarer page we can look at the rationale you used to explain why this would be a Great place to be social, explore, or exercise. Sometimes chain restaurants can meet that criteria. But as Subway has held the record for most locations around the world, this might be a high bar to meet.
Niantic is not always transparent in their decisions, so I understand the confusion.