When I visit steemd.com, I found that every user have different avatar on that site.
So I try to find out how it's work, and eventually got it.
First, let's give him a close-up!
A little evil，right?
How to check your avatar?
To check your avatar is very easy, just change oflyhigh to your steemit ID.
https://robohash.org/oflyhigh.png?size=256x256
The avatar of active authors under the CN category
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So include your avatar in every post you made, let every one remember you.
And you can go Robohash.org to find more details.
Enjoy It.