During each of the last five days, some of my answers - most being quite old - were upvoted within a short lapse of time. More precisely: 5, 3, 3, 3, 3 answers were upvoted within a few minutes for each day.
It is always pleasant to have upvotes, and some of these answers could be considered as underrated e.g, this one which was upvoted for the first time. Yet this seems quite strange. May I fear to have met a robot fan?