I don't know why most hackers always choose the negative effect of hacking. Why can't they choose the positive effect and gain from it like the hacker you just mentioned above.
It's seems the defi projects are not really secured . There have been a lot of reported cases of hacking activities going on the defi project . This alone might discourage more investors from seeing it as a nice project.
I really like this method but I think it should've been made private and not a Public affair. Though on second thought, I think the reason was to see how to combat a lot of hacks from various people.