There are 8 months being used as a "Use Year." So, one would expect that roughly 1/8th of the total points available at BCV share your June Use Year. The availability of those points is totally dependent upon how many June UY owners decide to sell their contracts, and how many of those contracts happen to have offers attractive enough for Disney to exercise ROFR. Oh, and it would also depend upon how many others might be waiting for June UY BCV points.
"Popularity" doesn't really apply here.