Rare would be a bit of an understatement. Cryogenic coolers are normally used in labs where LN2 is frequently used in small amounts, takes quite a while for the device to liquify a large quantity of LN2.

Companies like MOX make LN2 using fractional distillation of air, so its cheaper as you get a lot at once unlike cryogenic machines which do it drop by drop. Either way no one would actually own that kind of equipment, its just expensive.