Mmm, I'm still in two minds. Trying them out. Something in me don't like them, and some curation groups will not support you if/when you use these voting bots.
On the other hand, it can give you a good initial boost for more exposure and if your content is good (which is ultimately the point!) we are building the community stronger. So if I can get my money back after curation with a bit of extra STEEM I see it as a win. I've never invested any money personally into Steemit, so all the Steem Dollars I send was made by creating original content.
If you want to try them, check their ROI on this https://steembottracker.com/ site. It is never nice to simply burn hard earned SBD. ;)
Thanks, I am biased as well, in the end it should not be about bots upvoting our content, instead we should connect to people who are interested in what we have to say. But if your content never shows up anywhere.. So, you would say you haven't lost anything using them?