Occasionally.  Just last week I had two in a row - a first with my rather small portfolio of just over 100 pictures.
I have been going from keywording in German to keywording in English but my "English" pics get few views.  I am going back to keywording in German for a bit to see whether that helps.  I had the impression that the translation of English keywords into German is, well, not so great and German buyers using German keywords get better results with pics that were keyworded originally in German.  No ides though whether that's reality or just my imagination. 
Any opinios?

I had my first few last month.  Nice to get higher amounts than the micros and euros.