I do not think I complained about votebots, buying votes, or selling votes. I just gave my opinion on how I felt about them and left it up to the individual to decide if it is right or wrong. You, me, religion, government, nor even grumpycat can make people do the morally correct thing, or to even convince them that they are morally wrong, because morality is a thing judged by the individual, not a group.
Are there bigger things to worry about other than vote buying/selling , I myself am not worried about it, as I said, it is an option for people. and as you pointed out, it is a gamble if you will get a return or not.