At Las Vegas today I printed my Spirit boarding pass from the shared kiosk at no charge. Not sure if a Spirit kiosk would have charges, or if because I checked in online that the kiosk worked. (I have a lot of problems with spirit mobile boarding passes...)

I swear this airline more than most lcc has a mean streak if you dont pay up.. on a nearly empty flight they wouldn't let us spread out till after take off, when there was plenty of time before push back. Same exact situation on frontier or allegiant after the gate agent calls over the fas let people move.

Just my own experience.. maybe just the luck of the draw on flight crews.