I'm not an expert...but, I did get a credit back to my credit card about 2 years ago. This is how it was explained to me....
If you book a fare...say an Internet Fare....and that fare goes down in price at some point, you can get a credit back to your credit card for the difference.
For example....if you booked an Internet Fare at say....$89 each way....then, later that Internet Fare went down to $69 each way, you can get the credit back on your credit card.
Now, to contrast that....if you booked a Promotional Fare at say $99....then, noticed that a cheaper Internet Fare opened up at $79 so you changed fares from Promotional to Internet....then, you cannot get the credit back to your card. You take the Southwest credit in that case. This is also the case with DING as you are changing from a more expensive fare to a DING fare.
So it basically works this way....Southwest has different fares including Refundable Anytime, Restricted Fares, Advance Purchase, Fun Fares, Internet One-Way, etc....
If you book a fare....and then that fare ends up going down in price at some point prior to your flight, you can get your money back on your credit card. If you jump to a cheaper fare, you get the Southwest credit.
Of course, you can always sell the credit on eBay for about 85 to 90 cents on the dollar...sometimes more. I just recently purchased a Southwest Gift Card (no expiration) on eBay valued at $350 for $300....so, I'm already saving $50 on airfare before the fares are even released. I had also purchased my two adult Annual Pass vouchers on eBay at $340 and $375 that we activated in June.....now, we are FORCED to go back again in December and probably in May again just to get our money's worth
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