1) Because she gained experience while writing 7000 quizzes 2) Because with said experiences, she developed mastery on the topic (cf the 10'000h rule) 3) Beca

1) Because she gained experience while writing 7000 quizzes 2) Because with said experiences, she developed mastery on the topic (cf the 10'000h rule) 3) Because she can now charge sweet sweet money for her services (being the #5 quiz maker on BF would imply that she knows how to provides value) In retrospect, even if she did if for free, it wasn't a bad deal: it was a fun way to spend her time and she gained some skills It's not much different from whoever hacked Linux servers as a teen, then suddenly found this skillset could translate to good money on the market- sometimes more than what they studied for in college.