ok but why can they not do a S&T?? I don’t get it
In principle, we could do a S&T with Atlanta. Basically, Atlanta has two choices. 1) Make an offer sheet outright, and hope that the Kings won't match. 2) Come to an agreement with Bogi, but don't actually sign an offer sheet. Tell the Kings you intend to sign an offer sheet, and ask if the Kings would be interested in doing a S&T instead.
The reason #2 happens is because teams with RFAs who don't necessarily want to keep their players (this is a perfect example, with Hield in place to take up some of Bogi's playing time) will sometimes still match an offer, with the intention of trading the player down the line for *something* rather than getting nothing at all.
But if Atlanta takes route #1, and we match the offer sheet, then for a year we can't trade him to Atlanta at all, or to anywhere else without his permission. Just the rules.