I've been in 4 mug rug swaps and there is only one that I won't put my coffee mug on, it is priceless to me and don't want to get it stained or ruined. I put it on my kitchen island for 'pretty', the other 3 I do use. At my computer, my recliner and in my sewing studio.
I hope to make more for gifts and hope that they'll be used ... I don't make 'priceless' gifts, LOL.