Scientific evidence that gets better the more scientists use it
Just as for web services and collaborative public services, data sharing allows for post-scarcity quality gains the more people use it.
Each researchers’ data will get better the more other researches use them.
The analysis will get better as well.
As David (2011) puts it:
data-sets are not subject to being “over-grazed”, but instead are likely to be enriched and rendered more accurate the more that researchers are allowed to comb through them.