[no1lives4ever]

IMO youtube is the primary platform where those looking for videos will search first up. Thing is that if you have a large number of videos, you never know when one of them will get you a large number of views and subscribers. Or maybe in future google will have different goalposts for monetization. Overall, it is always good to have videos on youtube even if you are not monetizing them.

[HWR_14]

Good for who? good for Google. But how is giving free content to Google good for the poster?

[no1lives4ever]

If in future google changes monetization goalposts, then the poster can potentially make some cash from the older posted videos. And it is entirely possible that one video gets popular and brings in a ton of views and subscribers to the channel.