It has been 10 years since I last tried link units (now "link ads").
With all my problems trying to get targeted AdSense ads, I heard that "at least",
they provide much better targeting. That is what I needed!
So I gave them a try on a very popular page which only got cr@ppy ads.
It is a page about mathematics.
Lo and behold, the initial links seemed targeted. Just don't click on one.
Ten years ago, each link would provide about 10 URLs to click on, as I recall.
TODAY, you get JUST ONE!
How bad can they be? Here's a sample -
Link Name - - - - Single Link Offered
Binary Number --- Start PDF Download
Histogram Graph - Start Download - Search & Download PDF
Convert Number -- Optimize App Performance
Find Address with Number - Easy Public Record Search
Power Table ----- Wayfare: Official Site
I'll be dead before I ever try them again.
So many AdSense things have just gone south. And there is nothing to do about it.