I'm troubled by the fact that they cannot open the tool immediately and that it will take "some time". I also don't see the value proposition over say Google Scholar+alerts or Researchgate trends. Wait and see I guess. The current website doesn't have much information other than the fact that Meta got bought and some generic blurbs.

I'd much rather see Zuckerberg buy out an entire niche of science journals and Open Access them and keep them that way while keeping the high standards and impact factor in tact. Bioinformatics would have been a decent fit. I think freeing domains one by one with wads of tech-donor-$$$ might be the easiest stept towards open science.