Salt is a bit of a rarity among ops people but the funny thing is my experience is the opposite of yours - 66%+ of companies I see with Salt run in master/minion mode. I prefer it over Ansible when my ssh settings are super awkward (MFA, multiple bastions, etc) to integrate into an Ansible inventory file. One place with 900+ hosts and 300+ random IP ranges with tons of (badly written) compliance I spent about 3 weeks trying to get an inventory file hacked up and I gave up and deployed Salt within a day for the basic stuff I needed to do for basic running of shell commands from a single point of control.

Depends on their use case.

IMO, Salts best feature is probably running with the Master / Minion setup because it connects out to the master. Masterless is handy for using in conjunction with Vagrant, Packer, or another provisioning tool not so much for managing a the lifecycle of a server / OS.