Well as a buyer we buy more photos, and less illustrations. Illustrations we buy for most of the advertisements and images goes for our magazines. And as im both, somehow I feel like im making more money through illustrations as most of them download additional formats. i.e. like one illustration in additional format is as good as 25 regular images.
So i suggest do more illustrations as very few people do illustrations, say the ratio is 1:200 so you have less competition nd more money.
I think it mostly depends on how good you are at one or the other. If you look at the top 20 sellers on DT they are all photos - but that doesn't mean there aren't illustrations that are excellent sellers... There are contributors that just do illustrations that do very well here.
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