I just find it funny because, if I'm remembering right and not mixing up series, the author of Spy x Family hates the series, because they made it for a paycheque and it became more successful than anything else they wrote. Unfortunately, unless you're a Toriyama and able to just do whatever you want, your chasing the dragon that pays the bills - which would explain the sheer amount of crossovers, if the author doesn't really give a fuck about the series.
So if the Spy x Family/Wish crossover does well, it'll potentially cause 2 different kinds of Mald.