Hit spike from StumbleUpon

There has been a hit spike on the visit on my site.  It appears that many come from StumbleUpon.  Although the spike is significant, it didn’t make much changes in the Adsense  revenue.  I didn’t get any clicks but I’m okay with that.  I’ll see, over time if the traffic persist before evaluating the possibilities.

I wonder if enabling the comments would be a good thing.  Gonna give this some thoughts.