This is a grey area and one that might change over time. Currently, authors may benefit from sharing reagents, code, and data after a preprint posting but are not required to do so, in contrast with most journal publications. Sharing ahead of publication may seed new collaborations, accelerate discovery, and also enhance the group’s reputation for being cooperative. A large survey conducted by the Center for Open Science found that links to data and materials improved perceptions of a preprint’s credibility.