Yeah, he's got already two matches line up and those are the very reasons why he has accepted those fights. Main reason for him is about the charity purposes and there's already a beneficiary for that.
But it's not already a secret that him and the others who are doing such fights have their share too. Take it the example of Floyd Mayweather, he's already retired in the pro boxing but not in the entire boxing as he's open into exhibition matches.
I guess these two living legends are going to live their lives fighting for the proposed exhibition matches on them.
Of course, both Mayweather and Pacquiao can pledge to donate all they want but they cannot deny that they are also taking a small fraction of what they earned for their personal use. Other than that, these two legends can still do and enjoy their passion safely nowadays without getting too much bruises while still garnering huge revenues from the fight they organized. A boxer will always be a boxer as they said, that is why even if they already retired professionally they are still fighting in a form of exhibition and can enjoy the leverage of being a legend.
It's normal.
They're all having that business mindset and the cut was a sure thing even if it's for the charity. It could be that some rich folks have already pledged for them while they'll give the whole profit of the match to the charity.
There are deals like that and these two legends will just now have to enjoy whatever they're doing and whatever they're up to. They deserve the things they have now.