>>42775926
Because G4 first aired in China around 2014. The children who watched the show back then are now college students. In China, high school students don't have much money to expend, and the 70-hour workweeks after graduation from univ leave little room for pony enthusiasm. Therefore college students are the people spends most money for merch tied to broad anime IPs like MLP. Thus, college students in recent couple years have spent more on G4, and the manufacturers have capitalized on this trend are more willing to produce more.