There are several strategies to increase your sample size:
Segmenting your audience: Divide your audience into smaller groups based on demographics, behavior, or preferences to test different email elements. Incentivizing participation: Offer incentives such as discounts, free trials, or exclusive content to encourage recipients to engage with your emails. Expanding your email list: Use lead magnets, social media campaigns, and partnerships to grow your email list. A/B testing: Conduct A/B tests with different subject lines, email content, or calls-to-action to determine which elements perform better.