According to AZ Billiards explaination
How the BCA Ranking System Works
The BCA Ranking System is designed to rank American players according to their performance in American tournaments. Open single-discipline tournaments with total prize funds in excess of $40,000 - $25,000 of which must be added money - are considered for inclusion in the list of ranking events. No event shall be included whose dates conflict with major American or International events such as the WPA World Championships or ranking events that are already included on the BCA rankings calendar.
The BCA recognizes that not all events are equal. Events with larger fields, larger purses, and a larger number of top players deserve to carry more ranking points and they shall. In like vein, events that are smaller in scope will have ranking point deductions applied. The BCA standard event is a tournament with a field of 64-128 players whose prize fund is between $50-100,000 and whose field includes 13-15 of the top 20 players in current ranking points. The BCA reserves the right to change the definition of a standard tournament as circumstances require.
Fields less than 64 players will be penalized 10% of their points. Fields less than 48 players will be penalized 15% of their points. Fields of greater than 128 players will be given a point bonus of 10%.
Purses less than $50,000 will be penalized 10% of their points. Purses greater than $100,000 will be given a bonus of 10% of their points and purses greater than $200,000 will garner an extra 15% in points.
Fields that do not draw more than 12 of the top 20 players will be penalized 10% of their points and fields that draw more than 16 of the top 20 will earn a point bonus of 10%.
The basic points system that we will use is the same one used by the Camel Tour back in the 90’s. Here is the breakdown for double-elimination events: 1st=140 points, 2nd = 120, 3rd = 100, 4th = 80, 5-6th = 70, 7-8th = 60, 9-12th = 50, 13-16th = 40, 17-24th = 35, 25-32nd = 30, 33-48th = 25, 49-64 = 20, 65+ = 0 points. For single-elimination events the points are awarded as follows: 1st = 140 points, 2nd = 120, 3-4th = 100, 5-8th = 70, 9-16th = 50, 17-32nd = 35, 33-64th = 20, 65+ = 0 points.
Furthermore, the BCA recognizes that not all players can compete in all ranking events. Therefore, all players will be allowed to 'drop' one event per calendar year from their rankings. In this manner, players may miss one event per year and not suffer penalties to their rankings. Those players who do attend all events will also benefit in that their worst performance of the year will not be counted in their points total.
$77,000 in prize funds (including $25,000 added) should qualify the tournament for Money..
IMO having 13-15 of the top 20 players.. has got to be the issue.