Why should this site owner cater to someone using adblock software?
Because he's trying to make money and ignoring this problem may lose him users? It's not like he's actually showing regular web ads, so an ad-blocking user is as potentially profitable as any other.
Because he's trying to make money and ignoring this problem may lose him users? It's not like he's actually showing regular web ads, so an ad-blocking user is as potentially profitable as any other.