Vending machines are trying to steal all our money

I just moved into residence yesturday. Of course, that mean's I left some important supplies at home including my water bottle. To prevent dehydration, I decided to purchase some bottled water from a vending machine. The first vending machine I came to did not take coins. NO COINS. Only credit card or 5 and 10 dollar bills. Not that I didn't have 5 or 10 dollar bills but aren't vending machines notorious for malfunctioning and not producing change or the chosen product. Perhaps this is a sterotype (I don't want you to think I'm a hater of machines) but why are they suddenly taking larger denomenations. Certainly no drink would ever come to such a ridiculous price (Of course, companies could be preparing for the future when water becomes a scarce commoditiy). Needless to say, I didn't purchase anything from this particular vending machine. The next vending machine I went to did take coins and I happily placed the dollar seventy-five into the slot. I then pressed the numbers 55 only to see a confirmation come up for my choice of beverage 52. Luckily this was still bottled water. When the water came out, it was room temperature although it guaranteed a cold refreshing drink. I might be thinking too much into it but something makes me feel like vending machines don't like me anymore.