Nairda.....No more damage than 16 units of spots in 2 breaks in addition to a 2 minute promo going in!! Ultimately every station should operate commercial free all the time to get the most ratings.....but then the net profit would not be so healthy. Hockey is different....Wed., Fri., and Sat. nights....4 or 5 afternoon games ouch! Nairda....why didn't you buy the rt81 props? They practically gave them away.