It may or may not be a good deal because of the price of a full fare, refundable ticket. But the bonus for the Y booking is more than 5 TIMES the mileage.

It seems to be a mileage run, however, based on the rules:

"What is a Mileage Run? A true mileage run is a trip that’s sole purpose is to earn miles or points in a particular travel industry loyalty program. There are also mattress runs where travelers sometimes stay in hotels (or just check-in), just so they can get the required number of annual roomnights to attain elite status. Some people do Mileage/Mattress runs to get to the next level of status – others just do them for the miles, even if they don’t need the status miles."

And,

"Good in Mileage Run Deals:
1) Airfare deals that offer uniquely high value in terms of either miles/points to $$ or expedited status
2) Discussion within the individual threads of ways to benefit from the deal
3) The threads are not to be used for meta-discussion of general mileage run issues."

Post it where you want but in my opinion, it is or isn't a mileage run depending on the cost of the Y fare, or ways to get AA to book it as a Y fare.