Depending on your research goals, you may need to use different research methods, such as interviews, surveys, usability tests, or analytics. However, when you have a small user base, you may face some limitations and challenges, such as finding and recruiting participants representative of your target audience, collecting enough data to draw valid and reliable conclusions, balancing the depth and breadth of your data, and avoiding bias and noise in your data. To overcome these challenges, you can adapt your research methods or combine different methods to get the most out of your data. For instance, convenience sampling or snowball sampling can be used to find participants who are willing and available to participate in your study. Qualitative methods like interviews or observations can provide insight into users' motivations, emotions, and experiences. On the other hand, quantitative methods like surveys or analytics can measure and compare users' behaviors, attitudes, and outcomes. Additionally, mixed methods such as diary studies or contextual inquiries can collect both qualitative and quantitative data over time and in different contexts.