Probably hasn't happened as often as one might expect, now that I think about it. Maybe just once against Zoom in Johns' run? Even then I don't think...
Believe they have to get Carter's permission everytime they want to use her likeness, given it's just a short story in a one shot probably not worth...
And how is it particularly relevant today? Outside of an occasional throwback story in an anthology or Dr. Cyber (who pretty much has no relation to...
Wouldn't be surprised, SSKTJL already pretty much did that by making it Zeus that inspired her to leave Themyscira so I wouldn't be surprised for DC...