I don't even know anyone who snorts it in person, I always thought everyone knew oral was better.
I think some just enjoy the ritual of insufflating powders and/or they assume MXE will be more potent that way since that tends to be the case with most substances. Also, most people I've met who were already into Ketamine before they tried MXE seem to prefer snorting small bumps periodically as opposed to taking larger doses all at once, which seems kind of inefficient to me. Honestly, even being aware of the downsides to intranasal use, I still go between that and oral depending on the circumstances, often using both methods in one session. I don't go for the M-hole that often anymore, but when I do, I much prefer a moderate oral dose plus a few lines as opposed to a large oral dose all at once, or even moderate staggered oral doses.
I don't think I tried any method besides oral for six months or so after I first tried MXE, mostly because my living situation was not conducive to busting out lines whenever I felt like it, so I usually kept my use rather surreptitious. It was a strange and uncomfortable time in my life that I discovered MXE, and I was pretty reckless and naive when I first started using it. I ended up getting way higher than anticipated a number of times, usually when I would compulsively redose before the initial dose had reached its peak, sending me into outrageous levels of dissociation that I can barely describe or even recall very well.
The afterglow during the beginning of my use was incredibly remarkable, though. I had this peculiar delusion that these high dose experiences were not as important as the way I perceived myself and everything in my life during the comedown and following days. To put it another way, I thought I just had to go a little crazy for a while but that when I came back, I would inevitably have improved every single facet of my existence (and everyone else's by proxy). I thought I had experienced something so profound that, for a while, I genuinely did not even consider MXE a drug, but something like a cross between a vitamin, supplement or antidepressant. This is patently false, but humans are capable of convincing themselves of some pretty goddamn ridiculous ideas sometimes.
Anyway, it took me a while to really understand what the M-hole was and that getting there wasn't necessarily the most optimal use of MXE. It's interesting, no doubt about that, but being too fucked up to move, speak, or comprehend what's going on is not that appealing to me anymore. I find the K-hole infinitely more interesting and convenient because of its short duration, and typically reserve myself to small enough doses of MXE that I am still somewhat functional.