Unfortunately, this is just a form email being used to advertise the website they linked to. I used to be in charge of the website for the master gardeners association in my area, and we got dozens of these things every year through the contact / feedback form. They were always slight variations on the same template seen here, and near the end they all contained some kind of request for us to add a link to some vaguely horticulture-related business or content farm to our "resources" page.

I hope your site has had the kind of positive impact they describe, and I don't doubt that it has, but this message you got is from someone trying to take advantage of you.

Thanks!

Hi, I'm brand new here and just wanted to say I joined this instance partly because I saw this in the communities list. I don't know how much I'll participate in !notvoting myself, but the fact that it's allowed to be here tells me this is a relatively safe harbor for anarchists and others with unpopular-but-not-malicious views. That kind of discussion is a big part of what I'm here for! I'm also over on Mastodon at kolektiva.social, and we've had similar problems recently with people trying to hound that whole instance out of the fediverse (by pressuring other to defederate en masse) largely over the same issue. I don't have much to say about how to handle this from a moderation standpoint - obviously such a widely hated view is going to attract more than its fair share of venom - but I'm just glad the discussion of it is apparently more or less welcome here.