If tournaments inscriptions are not released soon, of course, fewer people will participate like in rogers cup which only had 5 or 6 days of registracion. The result: only 15 players. Moreover, the real tournament began August 4 and inscriptions were released that day or just 1 or 2 days before it. I think it will happen again on cincinnati and us open if inscriptions are not released already. I know this year there are less players than other years but so it is difficult to play more people.
PD: I know is summer and there are more things to do but are just inscriptions...