The website is spa.mnesty.com and it’s about wasting the time of the scammers and spammers.
This is how they describe their ‘time-wasting’ service.
Spamnesty is a way to waste spammers’ time. If you get a spam email, simply forward it to email@example.com, and Spamnesty will strip your email address, pretend it’s a real person and reply to the email. Just remember to strip out any personal information from the body of the email, as it will be used so the reply looks more legitimate.
That way, the spammer will start talking to a bot, and hopefully waste some time there instead of spending it on a real victim. Meanwhile, Spamnesty will send you an email with a link to the conversation, so you can watch it unfold live!
It interacts with the spammer by sending fairly open anodyne responses to each message until the spammer gets bored and gives up. The replies are generic e.g. I’ve talked with my colleagues and we are definitely interested. Can you tell me more’.
Or ‘ That’s impressive. I’m excited to hear more’ Can you provide references?’
And so on.
It doesn’t stop spammers but does occupy them fruitlessly.
If you have any experiences with these scams do let me know, by email.