Also, regarding OCDB. I would recommend reading the mentioned article.

"If you aren't aware of what @ocdb is; basically we are the biggest non-profit distribution project that gives authors a flat 10% profit. 1 post can be purchased every 24 hours and demand and price of Steem is what adjusts the max bid. We've found a healthy way to grow distribution to a number of deserving authors as we believe this will do the platform a lot of good longterm. Since this is nonprofit we also reserve the rights to who is on the whitelist and who isn't depending on our judgement of the actions taken by those users. This does not mean that we will be trying to exclude certain users on purpose."

So, OCDB is basically a bid bot, but it's non-profit, which makes it really interesting.