While inspecting varnish_text traffic, I noticed quite a few requests to bits.wikimedia.org flying by. Aside from the usual third-party favicon pointers and geoiplookup abusers, there were lots of requests coming from a user-agents similar to "WikipediaApp/2.0 * (Android *) Google Play".
I collected about a half dozen samples of 100,000 consecutive requests (represents ~ 7 seconds of traffic). Each sample about 1500-2000 requests are for bits.wikimedia.org, with about 100 of them from WikipediaApp hitting various wiki's load.php.
It doesn't look like an isolated case as it's well distributed (multiple user agent variations, different IPs, through different edge sites).
Filtered example:
```lang=json
{
"uri_host": "bits.wikimedia.org",
"uri_path": "/it.wikipedia.org/load.php",
"uri_query": "?debug=false&lang=en&modules=mobile.app.preview&only=styles&skin=vector",
"user_agent": "WikipediaApp/2.0-r-2014-08-* (Android *; Phone) Google Play",
"cache_status": "hit",
"content_type": "text/css; charset=utf-8",
}
```