Grabaseat is generally afforded more leeway than the Air New Zealand booking engine and for that reason is occasionally an early (or at least earlier) adopter of some technologies. It’s responsive as opposed to adaptive. It embraced Angular early on and isn’t afraid to try new ways of generating revenue.
One example of this is Reverse Auctions. A subsection where airfares and packages are loaded with a reserve and a price ticks down. First person to click wins, which on a load balanced site is a complicated scenario to ensure fairness.