I made an open source version of this. https://github.com/scott113341/southwest-price-drop-bot
Honestly, I think it's pretty lame trying to profit from arbitrage on SW prices like that. $3 per alert? Really?
Great job making an OSS implementation.
Lame? Possibly. Profitable? Probably.
It's actually quite stupid. If they did not ask Southwest for permission, they are asking to be sued, especially when you charge people money.