Eventually, in 2013, then- CEO Dick Costolo, who found the GIF avatars annoying, closed the loophole. However, accounts with existing GIF profiles were allowed to keep them.

A quick search will show endless Facebook users seeking out ways to use animated GIFs as their profile picture, and while that social network still doesn't allow it, Google+ has stepped forward to ...

Make sure the Current User is highlighted in the sidebar, then hover your pointer over the circled profile picture and click edit. With Memoji selected in the sidebar, click on an existing Memoji.