I don't think that's the problem. I've tried different sources, and the engagement no longer is there. Just dropped over a night. I also reviewed all the big girls with 1million+ karma and their engagement has dropped significantly as well. Some of them are still using Imgur and still nothing.As said above, there was significantly less engagement using redgifs over imgur. You can still upload gifs directly to reddit using new.reddit.com.
I am seeing redgifs posts hit the top of my niche subreddit.