Diamonds in bronze ranked lobby?

i get loads of d3-d1 players in my plat lobbies, this is not banner, or trail this is current season current ranks. i'm just assuming since so many people have stopped playing there isn't enough people to fill diamond and pred lobbies w/o a long * queue so they just stuff em in plat. have been put in diamond lobbies a few times as well witch is fun since you don't realize it and plat and diamond play very differently.