I wonder if it's something like the default settings of Tor Browser already prevent some ads that uBO also would have blocked, so that just makes the numbers wo

I wonder if it's something like the default settings of Tor Browser already prevent some ads that uBO also would have blocked, so that just makes the numbers worse for uBO, even if the user isn't seeing any more ads. Only other theories I can come up with would be Tor Browser interfering with uBO functioning optimally, or its version of FF not being new enough to work optimally with uBO.