Miners or not but I prefer running the cards in a way so that it last the longest time. I mean yeah you get your roi sooner but why risk the card? specially if you can game with it after you are done getting your roi + profits. I bought a 1080Ti like 3 years ago and I gamed the hell out of it for 3 long years and I even started mining on it when I don't game and it gives me around a good 43Mhs+. So there's no point ruining your card that like. after 3 years of gaming and a few months of mining my card is still perfect and I can still sell it for like £500. So yeah I personally think keeping GPU health good is better than rushing to ROI.