$200 Pre-authorization at Tiger Fuel Station - Ardmore

Stopped to get gas coming from Dallas to OKC at a Valero off I-35. When i scanned my card to get gas my phone notified me of a $200 charge at the same station. I immediately went inside and asked the attendant if they pre-auth $200 fo get gas and he replied, nonchalantly, in an accent not from here "yes, they all do it" which i called BS on and said he should display on the pump to notify people prior. I'm not hurting financially, but someone could be in a situation where a $200 hold could put them in a bind. Just a heads up. Hold is still there from yesterday.