Added an explanation for rate/request limits to FAQ (#1133)

CHANGELOG.md

@@ -14,6 +14,7 @@ Add your changes below.
 - Updated order of instructions for Python and pip package manager installation in TUTORIAL.md
 - Updated TUTORIAL.md instructions to match current layout of Spotify Developer Dashboard
 - Added test_artist_id, test_artist_url, and test_artists_mixed_ids to non_user_endpoints test.py
+- Added rate/request limit to FAQ
 
 ### Fixed
 - Audiobook integration tests

FAQ.md

@@ -52,3 +52,25 @@ If you cannot open a browser, set `open_browser=False` when instantiating Spotif
 prompted to open the authorization URI manually.  
 
 See the [headless auth example](examples/headless.py).
+
+### My application is not responding
+
+This is still speculation, but it seems that Spotify has two limits. A rate limit and a request limit. 
+
+- The rate limit prevents a script from requesting too much from the API in a short period of time.
+- The request limit limits how many requests you can make in a 24 hour window.
+The limits appear to be endpoint-specific, so each endpoint has its own limits.
+
+If your application stops responding, it's likely that you've reached the request limit.
+There's nothing Spotipy can do to prevent this, but you can follow Spotify's [Rate Limits](https://developer.spotify.com/documentation/web-api/concepts/rate-limits) guide to learn how rate limiting works and what you can do to avoid ever hitting a limit.
+
+#### *Why* is the application not responding?
+Spotipy (or more precisely `urllib3`) has a backoff-retry strategy built in, which is waiting until the rate limit is gone.
+If you want to receive an error instead, then you can pass `retries=0` to `Spotify` like this:
+```python
+sp = spotipy.Spotify(
+    retries=0,
+    ...
+)
+```
+The error raised is a `spotipy.exceptions.SpotifyException`