I agree with @James1 here.
If you feel that you cannot have $500 tied up on your card for the duration of your stay you may be much better off looking for a different host. There are risk-happy and risk-averse hosts, too. It is up to each and every host to call his shots, putting it bluntly.
A potentially careless person may cause a damage that easily exceeds, say $200, shrug with their shoulders and move on. The host is left to pick up the bits and pieces, organize repairs, and foot much of the bill, too.
Now, if a guest thinks that his $500 may never make it back to his credit card account he may start thinking a bit harder about being negligent and careless. There is a heftier price tag attached, so people start paying a lot more attention, too. The guests benefit from having a trouble-free stay, and the hosts benefit from having a smooth turnover, too. A true win-win for everyone.
Danny
If you find this information helpful, consider clicking the Thumbs-Up icon near lower right. Thanks!