Addition to the readme: “How can I contribute hosts records?”.

readme_template.md

@@ -147,6 +147,27 @@ into the final hosts file.
 The `whitelist` is not tracked by git, so any changes you make won't be
 overridden when you `git pull` this repo  from `origin` in the future.
 
+## How can I contribute hosts records?
+
+If you discover sketchy domains you feel should be included here, here are some ways to contribute them.
+
+### Option 1: contact one of our hosts sources
+
+The best way to get new domains included is to submit an issue to any of the data providers whose home pages are [listed here](https://github.com/StevenBlack/hosts#sources-of-hosts-data-unified-in-this-variant). This is best because once you submit new domains, they will be curated and updated by the dedicated folks who maintain these sources.
+
+
+### Option 2: add your domains to Steven Black's personal data file
+
+Fork this hosts this repo and add your links to [https://github.com/StevenBlack/hosts/blob/master/data/StevenBlack/hosts](https://github.com/StevenBlack/hosts/blob/master/data/StevenBlack/hosts).
+
+Then, submit a pull request.
+
+**WARNING**: this is less desireable than Option 1 because the ongoing curation falls on us and what you've just done is created more work for us.
+
+### Option 3: create your own hosts list as a repo on Github
+
+If you're able to curate your own collection of sketchy domains, then curate your own hosts list.  Then signal the existance of your remo as [a new issue](https://github.com/StevenBlack/hosts/issues) and we may include your new repo into the collection of sources we pull whenever we create new versions.
+
 
 ## What is a hosts file?