I know that many on this board believe in the importance of what Marcus has done for this team, but up until now, there hasn't been enough talent to cut into his minutes. Last year could have been a problem for him, but injuries gave him a reprieve. Next year he's likely looking at closer to 20 minutes or less, rather than the 30 he's accustomed to.
Terry Rozier is threatening to take his spot in the pecking order, and rather than using him as a small forward in spots, we will have log jams there too. After next year comes waves of draft picks, and because we are top contenders, vets will look to jump on for cheap one year deals.
This is just a long winded way of saying Marcus is not likely to get paid here. If he gets a $10M> deal, he will become a piece in a trade. There will suddenly be a lot of competition for the 6-7th man role here, and there will be some pretty good options that are much cheaper than he is.