I think if msg only pkgs get priority points, then its a matter of total points gained through donations. There are some huge donors who sit on the floor at MSG who don't get CA tickets.
Since you only earn 100 points per year, and points earned as a STH only count for consecutive seasons as a STH it doesn't amount to a hill of beans.
If all your points are from season tix, no matter full or MSG partial pkgs, you're not in great shape. 25 years as a STH get you 2500 points. However, someone attending only a few paid athletic department events over the years will have more points.
Bottom line: Even a 5-10k donation will allow most folks to keep their seat locations until the next reseating, which vould be 20 years.
Note: Folks in the new seatbacks at CA will pay considerably more for those seats, as much as seatbacks on the other side of the court.
Since we are now watching professional basketball with a reported payroll of 7-9 million, I'm expecting an increase in ticket prices. The only thing keeping prices reasonable is the desire to sell more msg pacckages.