autrefois
macrumors 65816
Or somebody was tasked with removing reviews that promoted piracy through jailbreaking and messed up. There are plenty of explanations that would fall under "inadvertent".
The idea that the purposely filtered song title containing the word "jailbreak" is silly.
My point is that they did not inadvertently filter the word "jailbreak". They may or may not have applied the filter incorrectly to things beyond the intended scope of filtering (by including songs instead of just reviews, as you suggest), but the censoring of the word "jailbreak" was not inadvertent by any reasonable interpretation of the word.
Although I am not, or will ever be, someone who jailbreaks my iPhone, jailbreaking is not illegal in the US. A typo is inadvertent. But unless any low-level employee can easily or accidentally change how the iTunes store works on a whim, which I highly doubt, replacing the word "jailbreak" with asterisks was not inadvertent.