Upcoming showdown at UFC 299 Saturday, March 9th in Miami, FL. The main event with raising superstar Sugar Sean O'Malley (17-1-0) vs Marlon Chito Vera (23-8-1) in a highly anticipated rematch. O'Malley seeks vengeance against the only fighter to tarnish his near-perfect record with an early stoppage TKO at UFC 252. O'Malley called out Vera for a rematch immediately after clinching the title with a TKO against Aljamain Sterling.

With that in mind and going back to my question

How much value does a fighter's card increase after defending their title or become the new champion?