Ah yes-- I come across these comments quite often, particularly when I am looking for quality content from newcomers. Seems they are often made to look "semi official" and like they are part of some "welcome wagon" but some kind of fishing expedition for upvotes.

"Hi, welcome to Steemit! This is the minnow supporting welcome to Steemit minnow welcome crew welcoming you to Steemit. Your upvote on this comment will help us continue to be able to provide this service to all newcomers...."

WHAT service? WHAT "welcome crew?" Who ARE these people.