You might enjoy the thread on Spirit bags then:
http://www.flyertalk.com/forum/other...-envelope.html

also, to keep miles active buy some crap from the mall, but don't do it last minute since it takes about 3 months to post the mall-miles and if you're looking to save it last minute it won't work:

http://www.flyertalk.com/forum/other...ping-mall.html

Got Hertz Gold? Here's 5k Spirit....
http://marketing.spirit.com/hertz/

It takes like 2 months for miles to post from promos. Your miles usually expire on the last day of the month they are due to expire but you will need to call them to verify this.

They really make life difficult if you don't have the CC. For 2500 you don't get anything without the CC. JUst check out the redemption page:

http://3freeflights.com/awards/awards.php

redemptions start at 10k for no CC.

And you found a $0 airfare and didn't post that either ? !!