I recently made the observation that despite the fact that new nodes
join the Tor network at a reasonable rate, other nodes disappear from
the Tor network as well, such that the total number of Tor nodes in the
system remains relatively constant.
I have also noticed in particular that while the number of nodes in
Germany seems to be increasing over time, the number of nodes in the
United States seems to be decreasing over time. While a few months ago
there were roughly eighty US nodes, now there are fewer than sixty.
My question, particularly (but not exclusively) to American Tor node
operators is: what factors have influenced your decision to remain a
participant in the Tor network? If you have shut down your node, then
why have you done so?