编辑以下段落，使其更具可读性和流畅性。


"The start-up was early-stage and pre-funding, therefore, the team was small and the resources were limited. They had to focus on a lean business model and choose marketing channels that would give them the highest ROI."
As the start-up was in its early stages and not yet funded, the team was small and resources were limited. To optimize their strategy, they chose a lean business model and prioritized marketing channels with the highest ROI.