The only way I can give away my images is through my website, to do marketing FOR ME, not for agencies.
So, this year too: opt-out! Not a single image of mine in the Adobe Stock Free collection, if you want them, you pay! 
the point is NO ONE WANTS these images! i gladly take $4 of passive income for older images that havent sold.
and nothing prevents you from private sales - likely a very different audience
Many photos that I don't sell on Adobe bring me tens of $ on Shutterstock or Istock.