It's not that you are in a black list. From my understanding you are not in a black list.
But if you (for example) buy 10,000 views, those views will likely come from users (bot accounts) who are never going to watch your content again unless you paid them again. But because they watched your content, YouTube will show those bot accounts your video in their recommendation first before recommending it to more random people. So now YouTube is maybe showing your content to 10,000 bot accounts all of which won't click on your video an to YouTube that is 10,000 people who just voted with their clicks that they were not interested in your new video anymore. Why would YouTube recommend your content to people when 100% of the people who watched your last video didn't click this new one?
I'm definitely exaggerating a bit for emphasis, but that's basically what is happening.
I shared a video below from well known a educational youtuber who talks about fake facebook likes and why they negatively effect your facebook page.
you can watch the whole thing, but i recommend skipping to watch 4:23 - 4:54 if you don't want to watch the whole thing. (about 10 seconds)
it's the same for subs and views and also remember the new youtube algorithm was modeled after the facebook algorithm
Thank you much for your reaction. I understand what you say. But my click frequency last 28 days is 8,1% for my overall channel (I bought only small amounts), the watching percentage is between 41,0% and 68,5%. Most video's are above 50%. (Lenght video's 3-4.40 min). Watchers loyalty is for a large part above average.
When I look at the video I uploaded 6 days ago, click frequency is 11%, average percentage 65,4%, relative watchers loyalty above average.
11 likes - 1 dislike. Views only 129, but that's caused by the lack of recommendations.
This all looks good to me, but yesterday youtube recommended my video only 21 times!
If I am not on a black list, what causes the huge drop in recommendations then? (btw content is not against rules).