Having had an xyz domain name I have to warn people that many mail servers will automatically think you're a spammer if you send email with it. No idea why.
Some of us (email administrators) have only recently started allowing .xyz email. It really was that bad.
The point was that there never was any "vetting" ever. Bulk-buy, spam, abandon. That's what spam was and is.
Which is a darn shame, because unlike .io or .xyz where the TLD doesn't necessarily signify what type of content you'll find, .science is clearly a subject-matter specific TLD, and it bugs me that because of these scammers, the association between science and scams is being perpetuated.
They have an exemption for abc.xyz by putting it on a whitelist for example.
1. https://en.wikipedia.org/wiki/MediaWiki_talk:Spam-blacklist#...