With most major programs, the check-out/check-in approach does not work to generate bunches of qualifying stays. If you want to do a "mattress run", you generally have to change properties each night. Obviously it isn't worth the hassle to earn 500 miles, but sometimes people do it during specific promotions (e.g., 4 stays to elite status, X stays earns Y bonus points, etc.) where the reward is bigger.

Also with most chains: you can opt for hotel points or miles. (Hilton is the exception that allows you to earn both.) Points are nearly always awarded on a per-dollar basis. Miles sometimes are as well. Check with the individual programs that interest you.

[This message has been edited by pinniped (edited Mar 24, 2004).]