I am not entering the contest because if I won, the scope would be stolen along the way. And if it did not get stolen, I would have to pay in taxes more than I would be willing to pay for a new scope.
Also, I would not want to disclose my country - that 'privacy' alone is worth more than a brand new scope.
But, I believe Dave should exclude the countries already included in Keysight's giveaway. They already have their chance to win one through that channel.
I would also push it even further and limit the countries to those where buying such an oscilloscope would be almost impossible for a young student or freshly graduated engineer. In that way, instead of adding one more scope - or a slightly better scope than was going to be bought anyway - the giveaway can really make a difference.
Perhaps using income per capita as an indicator could help. Like, make eligible only those countries where the scope would cost more than X months of average salary.
By the way, average income in Antarctica is four penguin eggs.
(No, my country would be excluded, too).
Now the whole western world hates me.