The question is how many of them are willing to review and read these publications. Of course as an individual scientist (not me, but someone who does experiments), I'd love to capitalize on my work, even if it is unsuccessful (in the sense of null result), by publishing it. But do I, and scientific community in general, care about null results? I'd say mostly no. Null results, if universally published, would overwhelm already overwhelmed publication system.

If you think it will be helpful to others to know about specific failure, put it in a blogpost or even on arxiv. Or talk about it at conference (for CS, workshop).

Also, if we use publications as a measure of scientists success, and we do, is a scientist with a lot of null results really successful?