ROI isn't the same thing as having more coins. You can buy and thousand coins for a dollar each and if the price goes to zero (which is what I strongly suspect will happen with this project, otherwise they wouldn't need to hire a cheesy bumping service in order to promote itself), then your ROI is -100%.
Really, I can't believe anybody would hire you to bump their project with nonsense, low-intelligence questions that could all be answered by looking at the project's website.
Its obvious that the only other person here besides you is me. Nobody cares about this project. Not even a bumping service can save a poorly executed idea.