Boycotting is a bit too extreme. You don’t need to deny yourself any pleasure to make a difference. I reckon it’ll even out. For example, the quality private agency prices haven’t increased like Ginza prices. There used to be a big gap between them.
Now when I look at the prices on say, MOC. $450/hr in a nice cosy apartment within walking distance to where I work and live, not to mention the higher likelihood for some serious GFE/chemistry with the girl. Ginza is now what, $330/hr to $350/hr for the top girls, within HIKING distance or Uber. Plus all the other factors like time needed to get to the punt and to return. Private agencies are starting to look a lot more attractive now, previously not so much.

So it’s not a case of boycotting. The higher price point of Ginza girls simply makes other alternatives much more viable now.