>>715371279They don't, it just takes time to seep trough that they're buying trash. Look at Star Wars, it took people two movies and spin-offs to realise that Disney produces crap for TRoS to underperform compared to everything else before.
Shit just takes time. Rise sold well, the next one will probably sell well as well, but not as much as Rise, and one after that we probably see people abandoning it.
Truly, the only thing I can see to not faire that way despite fuck up after fuck up is Pokรฉmon since they've managed to cultivate a massive base of people that will buy their shit no matter what.