Fun read! So close to unlimited point generation and process tickets for those fancy flights~ I would say if you wanted to generate "free" flights, which is entirely possible, learn how GDS works and the workflow for a ticket purchase and how a coupon is attached ;) but that would probably be going to far then just normal poking and secure disclosure but there is enough techdebt that if you know how one airline proce…
Can you provide a link or two so one could read up on what you've mentioned in your post?
I think a lot of the "fun" that can potentially be had also requires a direct access to a GDS, which, AFAICT is on the order of ~$10k a year?
And if your "tricks" are discovered, airlines have a direct way to demand payment for any shenanigans you've pulled (ADM, https://www.ana.co.jp/businesspartners/en/admacm-policy/). But perhaps OP had something different in mind, I'm curious myself now :P
If you wanna really go off the deep end, try looking into "fuel dumping" community — there's a small group of people who basically have figured out a series of bugs in how fares are coded (that lets them buy flights much cheaper then intended).
They use (very dumb) coded language to talk about their "findings", and are very very very unfriendly to newcomers; but it's a fascinating world to observe.