<paid> field in RSS feed

I'm trying to get certain stories to be outside our Whiz app paywall. It seems like the app determines what's behind or outside the paywall based on the <paid> tag.  <paid>1</paid> is behind the paywall and <paid>0</paid> is outside. Is there a way to manually change that for specific assets?

I could do it with section tags but I don't want it to link to a section tag that's only reason for existing is to stop the paywall. The reason for this is I want to be able to send push notifications linking to specific assets but I want them to be free if I push them. I could set up a "push" section tag but on the website I don't want the asset to be on the URL /push/article_658aae14-6597-51fd-aaea-43d1056cf9a9.html.