New statistics for Google Sitemaps

How many subscribers for feeds

[jetteroheller]

Now shows the Sitemaps the number of subscribers with Google feeds.

Very frustrating. I have around 300.000 page impressions per month,
but only 20 subscribers over all my domains.

[Token]

But the stats are only for :

People who have subscribed to these feeds using Google products such as iGoogle, Google Reader, or Orkut.

I am sure most people use some kind of dedicated RSS reader which this wont detect. But could be something to look forward to especially since Google acquired feed burner

[ashii]

How this is related to adsense?