Major Banks Have Pulled Out from Youtube Advertising?

Sorry if this post is not appropriate, I know a lot of this subreddit's members are sensitive about mention of Youtube/YT influencers (for good reason) -- I was just personally curious about this.

From Ben Hedges'/CreditShifu's most recent YouTube video, he mentions that all major banks have pulled out of providing affiliate links to YT creators with the exception of Chase, whom also recently pulled affiliate links for YT creators. This tracks as well with Ask Sebby removing every single video mentioning Chase credit cards from his channel, maybe as a protest to Chase removing their affiliate link program?

I was curious whether banks cutting affiliate link programs could be a sign of something else, potentially wanting to reduce churning practices and sign-up bonuses losing value over time. Last year, we already had Chase cracking down on the Ink Trains, and AMEX introducing things like lifetime language offers for SUBs or family rules to limit how many AMEX points a person can get for personal cards. It seems pretty clear churning practices have been cracked down on the past couple of years, is this part of why banks are cutting affiliate links altogether or are YT/streaming advertisements not as profitable or worth investing in?