Yeah, you're right, that is the reason. I've been working full time for the site for over a month now and get to spend a few hours a day swatting bots. A lot of tools we've put in help but just manually checking the accounts they flag usually leads me to thousands more.
Yip, just strange that the bots can have a upside too, because the higher the Lotto jackpot is, the more money will flow into it from people who are seeing the massive carrot.

We are 1 day and 8 hours from the draw and the Jackpot is only at 0.28 BTC, where it was at 2.6 BTC a few weeks ago.
Oh, well.. The advantages of not having bots might outweigh the disadvantage of not having that big carrot.
