I don't see Lindsey returning to Fleetwood Mac because he'd have to become part of their partnership which I think would mean he gets a share of the pot of gold.
I think Neil and Mike were salaried for the 2018 and 2019 tour, maybe they gave some golden carrots in the contract to Neil and Mike like a cut of merch, concessions, and sponsorship. But then another contract comes with the next tour.
I don't think Stevie would want Lindsey to return to getting the same share as hers. I think mitzo will come in to support this statement