I dont have a problem with it. Its standard fare with them. If they have a PPV event the weekend before, they air the main event first thing the next week. I think its great. Not everyone wants to shell out $50 to se a PPV fight, especially if they can see it for nothing on HBO the next week.
Plus from HBO's standpoint, it gets more viewers on to watch their entire broadcast, rather than knowing the main event wont start unit XX time, and then skipping the earlier bouts on the undercard.