Do you do that or
publish all your data in the first paper and watch a dozen grad students publish your next nine papers in three weeks ?
Incentives matter yes. Science and data should be free and transparent. But if we pay peanuts and expect the monkeys to appreciate the applause of publication, we need to change our incentive structure.
The reasons AI / ML researchers don't mind publishing the data early is because they already get 500k salaries and equity.