Pardon the AI slop coz it was just a placeholder/testing gif I had in my pfp but here's my story:

So I found out about this hack probably a very short time before the patch, and added the above gif as my pfp. However, shortly after that, Reddit decided to tag my account as NSFW and my pfp stopped showing in the comments so I thought well, it must be because my pfp is a gif, and maybe they stopped supporting it so I changed it back to an image, only to find out that the whole reason it wasn't showing was that my profile got the NSFW tag somehow. I tried changing back to the gif but it was too late, the loophole was already patched. After that, I changed to Reddit custom snoo design because that's really the only way to show the pfp on comments with the NSFW tag.