The potential value that a startup needs to have in order to attract venture capital (VC) funding varies widely and depends on several factors beyond just revenue and costs. While revenue and market size are important considerations, VCs also look at growth potential, scalability, competitive advantage, team strength, and market dynamics. Here’s an overview of how these factors might apply to your example:

### Revenue and Market Size
- **Annual Revenue:** In your example, the startup generates up to $9 million in annual revenue ($60 per year per subscriber × 150,000 subscribers).
- **Costs:** Estimated annual costs are less than $500,000.

### Factors Influencing VC Funding Attractiveness

1. **Market Potential:**
- **Total Addressable Market (TAM):** VCs look for startups targeting large and growing markets. Even if your current market size is $9 million annually, VCs will assess whether the market has the potential to grow significantly.
- **Subscription Model:** A recurring revenue model like subscriptions is attractive because it provides predictable income and potentially high customer lifetime value (CLV).

2. **Growth Potential:**
- VCs prefer startups that can demonstrate strong growth potential. This could include plans for customer acquisition, expansion into new markets, or scaling operations.
- Growth metrics such as month-over-month or year-over-year revenue growth rates are important indicators.

3. **Scalability:**
- Scalability refers to the ability of a startup to grow its revenue significantly without a proportional increase in costs.
- VCs look for scalable business models that can potentially reach large numbers of customers with minimal incremental expenses.

4. **Competitive Advantage:**
- Startups with a unique value proposition or a competitive advantage (such as proprietary technology, strong brand recognition, or exclusive partnerships) are more attractive to VCs.
- It’s essential to articulate what sets your startup apart from competitors and why customers would choose your solution over others.

5. **Team Strength:**
- The expertise and track record of the founding team are crucial. VCs assess whether the team has the skills and experience to execute the business plan effectively.
- A strong, cohesive team with relevant industry experience can instill confidence in investors.

### Example Evaluation

- **Market Size vs. Potential:** While your current market size is $9 million annually, VCs will assess whether this can grow significantly over time. They might look at trends in subscription adoption, market saturation, and potential for upselling or cross-selling additional services.

- **Profitability and Costs:** VCs evaluate not only revenue but also profitability. Your estimated costs being less than $500,000 annually is favorable, as it suggests potential for high margins and efficient operations.

### Conclusion

The specific dollar amount of potential value a startup needs to attract VC funding can vary widely based on these factors. While $9 million in annual revenue and low operating costs are positive indicators, VCs will also consider growth prospects, scalability, competitive advantage, and team strength. It’s crucial to present a compelling case that highlights your startup’s potential to achieve significant growth and dominate its market segment, even if the initial market size appears modest.