Yes, I think it's first avatar campaign for very long time. In my early days here I remember there was more avatar campaigns, but can't say that it was big thing there.
$1 is great deal, probably you can't ask for something better, considering that's just image without clickable link.
Way back before campaigns are mostly for signature campaigns, and avatar campaigns are separate. Sometimes it's a fixed rate like $15-25 per week, so $1 per post is a huge improvement for payment rate if you can post more than 25.