If a youtube channel is being recommended to you because you watch videos similar to that channel doesn't mean he is being promoted by youtube. I listen to drake, weeknd and daily I get recommended community uploaded songs of those singers in a random channel(not offiicial) with 400 to 1000 views. Doesn't mean that those channels are being promoted by youtube. It's something what only youtube knows how it decides what are we going to get recommended. Another example, I watch CS case opening videos of sparkles, I even am subscribed to him but I always get recommended videos of anomaly or ohnepixel. Ohnepixel's videos are not even his original, they are like some channel uploading his live streams.
My random guess here is, because he is trending right now in the niche you watch that's why he is getting recommended to you.