Originally Posted by njcommodore

The MegaMiles is based on stays not nights, so you did the right thing crediting to points for that stay. If you have short stays credit those to mega miles, unless you need them to get the 20 nights. I'm going to be right around 20 for the quarter, but the 2 Cat 4 certs mean more to me and I'd rather get points than miles. My 20 or so nights are spread over 10 stays. I'm crediting the 4 longest to MegaBonus (for the 2 cat 4 certs) and the rest to MegaMiles. Yes, you can switch back and forth, just wait for the previous stay to credit before you switch.