For acquiring users Hacks for a SaaS prototype, focus on targeted outreach through channels like social media, industry forums, and online communities relevant to your target audience. Offer early access or exclusive incentives to attract initial users, and leverage partnerships with influencers or complementary businesses for increased visibility. Utilize content marketing to showcase the benefits and features of your prototype, and actively engage with potential users through personalized outreach and demos to drive adoption and gather valuable feedback for further iteration and improvement.