We don't guarantee an ROI at all, but we boost posts about services/communities to high on the front page. Many people look through the trending page every day, with most posts getting 20-30 comments. We will run giveaways along advertisment posts for people who join the service or community to help provide a better ROI. The prices above are based off figures from my own bot, @KiwiBot and other bots like it, such as @Moonbot and , looking at how many followers their account has compared to how much money they get a week, and how many subs they get when they boost a post to the front page. This method is cheaper than boosting your own post to the front page, which takes 200-300 Steem.
The application fee is only 1 Steem, and this allows us to filter out all of the spammy services. It's 1/10 of our cheapest option, cheap enough to stop services without the funds to use Advertise from filling up our application queue, and anyone we approve gets 1 steem off their final price.
RE: Introducing Advertise! Grow With Us!