We started a charity to alleviate wild fish suffering. We spent $30k trying to contact fish farmers via email. This didn't work, so we gave up. We consider the project a success.
https://forum.effectivealtruism.org/posts/z59wybc56FCAysrAe/how-we-started-our-own-ea-charity-and-why-we-decided-to-wrapComments 31