Exclusive Listings

I have a listing for a friend and we decided to keep it exclusive until they have finished fixing up the property and when they are really ready to sell.  This is quite a unique property and there have been many responses, even with just a sign and flyers.  The thing is, it says exclusive right on the sign.  Yet I have had 2 real estate agents so far calling to ask what the comp is for the selling agent.  Don't people know what exclusive means?  Or maybe they just figure sales are so hard to get they will try anyway.  Since my clients are not really ready to move and are just testing the waters right now anyway, should I respond and offer a commission?  Should I make it a very low commission?  Or pay the usual.  My clients originally wanted to have the negotiating power to give back to the buyers, but that won't happen if they have to pay the selling agent.  Is there a right or wrong way to do this?