In what may be a new trend in corporate cross-promotional synergy, large companies like Best Buy and Ameriquest are offering customers who subscribe to special promotional e-mails first crack at tickets to some of the hottest arena rock concerts of the season. “Typically, bands give their fan-club members a chance to buy tickets a few days before the general public.” But rewarding those who buy a new DVD player with early access to unrelated concert tickets has some fans steaming.