StumbleUpon Funding

TechCrunch amplifies a rumour around funding for StumbleUpon:

Two sources have confirmed that the rapidly growing StumbleUpon recently approached at least one large Internet company to be acquired. The asking price was $50 million.

It is interesting to plot the referral stats (the usual caveats apply) for this property and digg.com.

Of course, the sample is biased, etc., etc., but - do I see a slight incline for StumbleUpon and a decline for digg? This is a little like reading tea leaves due to the nature of the sample, but there may be substance in the relative trends.