Update: Keymailer’s co-founder has spoken about the matter on Reddit via a comment, here’s what he had to say:
Keymailer co-founder here. This was news to me when I saw this thread. I reached out to the management team and apparently this is, sadly, an error on our side. The game was incorrectly tagged when we imported the upcoming releases.
Apologies on behalf of the company for any disappointment on this, as a Switch owner and a fan of Crash Bandicoot, I would have been as excited to play this.
Recently, due to a post on the Nintendo Switch’s Subreddit by 4k60fpsHDR, some news outlets have been spreading the news of “Crash Bandicoot N. Sane Trilogy listed for the Nintendo Switch”, which in the listing itself by a review code provider site “Keymailer.co”, did not clearly clarify the reasoning behind this inclusion on their website but did say that “the publisher [Activision] for that product is not on KeyMailer”, aside from the fact that it was first posted about on the Crash Bandicoot Subreddit a month ago by II_JumPeR_I, rugged under due to its inconsistency, doubted of trustworthiness or possible error on the site.
It is important to note that this post is to debunk the dubious notion about some “proofs” about the status of Crash Bandicoot N. Sane Trilogy’s PS4 Exclusivity, somewhat inconsistent but still remained set in stone for the time being communication of it staying that way, in no way or shape that is about the platform favoritism or elitism, even with arguments about brand awareness being linked to its value of being on a single platform.
Examples range from the earliest posts on NeoGAF by Infinitemadness way back in June 2016, to the Best Buy Canada Store Banner that was claimed by a store staff as “outdated and incorrect”. Retailers around the globe also got somewhat mixed messages about the exclusivity from Sony and Activision, leading some social media profiles like PlayStation Ireland to claim that it’s a “timed exclusive” after them saying it is “exclusive”, whereas some promotional material claimed that the game is fully exclusive.
Regardless of how this unfolds, please keep in mind that unless otherwise confirmed directly by Activision, Crash Bandicoot N. Sane Trilogy remains a PS4 exclusive for the time remaining, taking things like this with a grain of salt.
My personal take as an author on this is: unlikely to happen, unless proven otherwise officially by Activision or with a more substantial proof of a leak.