5 recommendations for smarter crowdsourcing: (1) replicate and scale successful examples (e.g. smarter crowdsourcing for Zika); (2) use crowdsourcing not only to build legitimacy, but for knowledge building; (3) construct a range of diverse practices to draw on different types of expertise; (4) ensure that engagement is no longer limited to interest groups; and (5) accelerate social science research on who participates and why.