> I have never heard of Sentako and don't know what that is.
You should know sentaku.org (not Sentako, sentaku is 選択, selection),
since you accepted the request below:
http://qb5.2ch.net/test/read.cgi/operate/1393063744/690
http://qb5.2ch.net/test/read.cgi/operate/1393063744/753
It seems easier to do something dishonest like multiple voting on 2ch.