A lot of blogs encourage taking advantage of the credit card sign-on bonuses, but I don't quite get how these are beneficial in the long run unless you are able to combine your points with different cards. To me, it seems like the points are good for one flight or so, and then you have to get a new card. Would someone mind clearing this up for me? Also, please let me know if I am posting this in the wrong forum. I am still trying to get the hang of things. Thank you!