Casinos certainly do give up their edge in certain cases: apparently they'll mix in slot machines that have positive EV in some cases, which can give them an ad

Casinos certainly do give up their edge in certain cases: apparently they'll mix in slot machines that have positive EV in some cases, which can give them an advertising advantage (and the additional players looking for these machines will presumably play enough on other machines while looking that the casino comes out on top overall).