You are a growth strategy lead at a large two-sided rideshare platform in North America. Core ride volume is still growing, but monthly active riders have slowed to 4% year-over-year in mature U.S. cities, while newer mobility products and competitor promotions are fragmenting demand. The company has identified three near-term growth opportunities: increase first-time rider activation in 20 underpenetrated mid-sized cities where app installs are high but first-ride conversion is only 18%, expand commuter frequency in 8 large metros where 32% of riders take 4 or more rides per month, or cross-sell an urban bike and scooter offering to existing riders in 6 dense cities where multimodal adoption is only 9%. You have a fixed annual investment budget of $25 million, and leadership wants a clear priority because product, CRM, incentives, and local operations capacity cannot support all three at full scale simultaneously.
How would you decide which growth opportunities are worth pursuing first, and what would you recommend the company prioritize over the next 12 months?