Building trust in your pre-sale campaign

Hi all, I'm trying to sell the product concept before committing to building: * Inbound campaign, so social media posts about the product, generous refund policy, etc. * I'm avoiding Kickstarter because it's not the platform where my target market hangs out at, and I don't want to force people to create an account and go through hoops * Since it's inbound it's not like I'm setting up 1:1 calls with each potential customer and selling them the product after a series of calls I'm curious how to do this so people trust you enough to give you money - I've seen people have misgivings because: * Why should I believe you won't just run off with my money? * Why should I trust you with my data? * Who the heck are you, random stranger? I have the following ideas: * Generous refund policies * Creating an About Me page with references from people who know me (like a 'Team page' for your startup) * Proof I'm not a random asshole * I'm active on LinkedIn so it shows I'm putting my reputation on the line * Include a link to book a quick 15-min demo call with me * I don't have the product built yet, but I can share the privacy policy (you're in control of your data, we don't share it and we don't train our model on it unless you opt in) Open to suggestions.