I'm all for a sold-out ECAC tourney (no matter the venue), but the 3 RPI/Union games this year, all played in the Capital District, have had attendance of 2327, 2740, and 2520. These are games scheduled months in advance - I just can't see an extra 10,000 fans deciding to go to the tourney games on a week's notice. Very few schools send more people to post-season games than they get for home games - I doubt even Cornell sends more than its rink size (4237) to Albany.
Yes, I realize that the game at Union was sold out, but 1) the games at RPI are an indicator that the top end of interest isn't a whole lot higher than that, and 2) a small rink is a double-edged sword. Sure, it looks great to be able to tout sellouts, but there will necessarily be a pretty small group of people who go to the games. There may be a lot of people in the Albany area who would be Union fans if they could get tickets, but they can't, so they can't possibly be as into the program as if they were able to attend a lot of games.