In truth, there is so much wrong with so many of these adverts that it is actually a bit pointless fixating on just one phrase.
I just spent three (count them, three) minutes on Gumtree and came up with any number of downright foolish adverts. Try this one:
https://www.gumtree.com/p/other-musicians-wanted/bass-player-urgently-wanted-for-live-show-the-garage/1135985303
Now these people are probably absolutely straight, nice people, good musicians. I wouldn't know. How can you tell?
Apart from the venue and the date, there is literally NO information. I don't know what the line up is, what sort of music they play, whether they're any good, is money involved at all, where and when they want to rehearse, etc. etc. etc.
And all that for a one-off dep role for their "main bassist" (they operate a roster system?).
Who in their right mind would waste their time replying to that advert, and how could any reply NOT be a time waster?