Performance metrics with FBA and MFN backup

Let’s assume you have one seller account for the US and you use a mix of FBA and MFN shipping for your products. For some of your FBA products you have an MFN backup offer should the FBA go out of stock.

When the FBA fulfilled offer sells out, does the product take a BSR hit because of being MFN?

How does Amazon handle ASIN performance data given the mix of fulfillment methods for a single ASIN?