The issue with most of these adf.ly links is that they are mostly on older topics, dating from 2011-2015 mostly. The issue with that is that 9 times out of 10, the original creator has been long gone from these forums, meaning they won't edit the posts to give a direct link, especially now considering that forum activity has significantly decreased since those times.
Personally, what I've found to get past adf.ly links is generally foolproof.
I have this adf.ly skipper extension on my browser which skips the 5-second ad bit.
However, whenever I land onto the part where I need to enable notifications, I just decode the destination URL, because if you look at the little search box where it shows the current URL, what adf.ly does is it encodes the destination URL inside of the website URL, so I decode that. Then I'm good to go!