Tagging free/paid stuff. (Patreon)

So I've been copy/pasting this notice on posts that are free on DeviantArt but paid on Patreon:

This image is free on DeviantArt but has to be Patrons only due to Patreon's stricter nudity policy."

I make sure to do this because I just don't want anyone to feel mislead like, "Why am I paying for this if it's free on this other site?" But yeah, Patreon requires ALL nudity (even implied nudity) to be on a paid tier while DA is more lenient. 

To save me a little time and make it easy for people to search/filter, I'm just going to add this tag "FreeOnDA" instead of that notice going forward.

I am also going to start adding a "subscribers" tag to posts that are subscribers-only to make those clear and also for searching/filtering.