Snife's existence, much like ZAM, is rooted in player purchases to keep it alive.
Snife probably wasn't selling enough load-out's to keep it alive. Servers cost money on a monthly basis, and while a purchase is appreciated for the support it brings, it requires continuous purchases to properly fund the server. In the event Snife returns, i'm sure you're loadout will be there. I'm sure a admin can tell you something similar, but for a more official response from staff you should create a support ticket.
https://undeaduprising.net/forums/support/create/
Thanks