I have in the region of 160 live sites, but can honestly say that there is probably only 8 to 10 of these that regularly produce players.
Every now and again I will pick up the odd player from one of the “dormant” sites. I call them dormant because they are old sites and live but generally only get updated when a casino closes down, tracking links need to be changed etc.
I can say for certainty that the sites that regularly give us the players are the ones that we update regularly.
I guess I just keep all of the other ones for a rainy day in the hopes that one day I may have the time/resources to revamp and update them.