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Now, I am getting like 150-200 votes for my giveaway posts, and it is really taking too much of my time to send all the voters SBD. I am posting twice per day, so it means that there are 300-400 voters per day to whom I have to send this.

Nice job anyway. It takes time to do all that.
I see for my posting and replying + reading i've spent 3h :)

I wish there was an automated way to send payments. I think @littlehelper has found an automated way.

I have talked to someone about automating this process. If I get a positive response from him, I will post about it.

Cool, keep us updated. :)