*******I rented from Alamo 2 months ago and the only thing that was charged to my card was the original reservation amount. No extra holds.*****
People, you probably do not understand what I am talking about. The hold is detailed in the fine print of the multi-page contract you sign and agree to, but you are usually never "told about it."
And, it does not appear on your credit card bill. It is just that, a hold. If there are no issues during your rental, it is eventually dropped and you never know about it.
I just did a quick google, because I don't want to waste my time, but, you folks who swear you never had it are probably wrong. The following explanation is probably not the best one, but it is the one that popped up when I did my very quick google. According to this link (which again, I do not vouch for), the extra charge on top of the actual rental cost is around $200-$300.
http://www.best-car-rental-tips.com/hold-on-a-credit-card.html