update scraping section of readme

README.md

@@ -30,6 +30,8 @@ The ``master`` branch runs on the master branch of GotHub. This means that the i
 
 Have an instance you want on the list? Make an issue or PR!
 
+You can find a json-list of the same in [gothub/gothub-instances](https://codeberg.org/gothub/gothub-instances).
+
 [^1]: Has some modifications: https://git.vern.cc/vern/modifications/src/branch/master/gothub
 
 ## Setup
@@ -64,7 +66,13 @@ gothub.example.com {
 }
 ```
 ## Scraping
-Variables: 1) GOTHUB_USER_AGENT - Sets the User Agent to use for making the requests. Defaults to Chrome 110 on Windows 10.
+Other than for the explore page, gothub uses scraping in order to retrieve the information.
+
+This makes it hard for gothub to get ratelimited.
+
+You can also set the GOTHUB_USER_AGENT envvar in order to set the user agent with which GotHub makes requests to Github.
+
+By default, we use the user agent of Chrome 110 on Windows 10.
 
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