Your visibility is a very important thing. You can’t continue to get work without it. That being said, you should always ask the question: How is the project going to be published? This is the only question that really matters. Yes, you can ask questions about ownership and money and printing and terms and limits and whatever else, but the only thing that really matters is how will the work be seen. If the work isn’t seen, the rest of it doesn’t matter.
If you or the creator you’re working with doesn’t have a plan beyond some sort of vague notion of a Kickstarter/GoFundMe campaign, then you know your work isn’t going to be seen. (And no, saying that it’s a pitch to any company isn’t a plan. Assume the worst in that the pitch will be rejected. What then? Always plan for the worst. Always hope for the best.) Then you have to decide if there’s something about the project that is worth your time (ie: money, great interest). You don’t want to be attached to a project that’s not going to be seen.
Your visibility is your responsibility. Take care of it.