I'm not sure this part works: "to grow by a large factor (10x or more)".
Most businesses I come across that describe themselves as startups and fit the rest of the definition, haven't yet got themselves to a point where a 10x improvement over the next year would make them that significant.
Most businesses I come across that describe themselves as startups and fit the rest of the definition, haven't yet got themselves to a point where a 10x improvement over the next year would make them that significant.