Strategy #1: Manual work
Strategy #2: Narrow the domain (Vertically integrated businesses)
Strategy #3: Crowdsourcing / Outsourcing(Use cases where quality control can be easily enforced)
Strategy #4: User-in-the-loop - designing products that provide the right incentives for users to give data back to the system. (Consumer-centric startups with constant user interaction)
Strategy #5: Side business - by offering photo apps that gather additional image data for their core business.
Strategy #6: Data trap - Trojan Horse - is a core part of a startup’s business model (not merely a side business).
Strategy #7: Publicly available datasets
Strategy #8: License third-party data
Strategy #9: Collaboration with large corporation
Strategy #10: Small acquisitions ((Later-stage) startups with enough funding)