your 40k one time or throughout the year?.. they have stipulated terms like minimum 5 times per month irrespective of amount, etc..

i think the fee waiver was hot some time ago when many rejected using credit cards..so banks became creative.. that generation have become old and no longer use their CC or small transactions..
banks now see gen Z as big spenders and trying to catch them.. so make CC as a thing only rich can afford..