How is this channel doing money?

Hi guys, look this channel, nich: video music lyrics. How do you think this channel is making money, for sure this channel is not monetized. I dont see any website to send the traffic. Im interested because i have a chanel like that and i earn $0.
https://www.youtube.com/channel/UCVu5opa9d4JdDxGsR3zaqAg

probably by promoting new artists music, he has contact information listed in description and over millions of subscribers

Just looked at his channel and there are lots of artists that i don't know even though i am an music addict. Probably he or she has lots of connections with new artists. Compared to other lyric channels, this channel has 1M followers which is A LOT. It's pretty much a platform of oppurtunities for new artists. Also he-she is specifically posting latin music only. If you were a channel that is sharing only Japanese music for example, that would blow up pretty fast. Especially Native speakers would reach you out for many reasons.

Maybe they are promoting new artists musics as the op stated above, you can try to scrape soundcloud & spotify artists and offers them to do the same for like $5 or $10 the video.