Like with you and many other commenters here, I also find the large effect sizes quite puzzling. It definitely gives me “Hilgard’s Lament” vibes—“there’s no way to contest ridiculous data because ‘the data are ridiculous’ is not an empirical argument”. On the usefulness of Cohen’s d/SD, I’m not sure. I guess it has little to no meaning if there seems to be issues surrounding the reliability and validity of the data. Bruce linked to their recruitment guidelines and it doesn’t look very good.
Edit: Grammar and typos.
For option 3 to be compelling we certainly need a whole lot more than what’s been given. Many EA charities have a lot of RCT/qual work buttressing them while this doesn’t. It seems fundamentally strange then that EA orgs are pitching SM as the next greatest thing without the strong evidence that we expect from EA causes.