I did add it (I've added all 3 entries), but I don't know how smart Windoze is, I know that at least wildcards are not accepted.
The hosts file isn't smart, it just does what you tell it to do. And you are right, it doesn't accept wildcards. If you add a domain name to block it, it will block only the main domain. To block subdomains, you will have to add each one of them individually.
If you want a better way to block a domain with all its subdomain then better use a DNS service such as OpenDNS.
Also spinbot is most probably a multi-purpose website and not all its users are malicious.
So, depending on each and everyone's interests, it may or may not be a good idea. So I preferred to not suggest that.
The question here is how did the scammer manage to create a subdomain on spinbot.org and host the phishing page on it? Is the domain owner also involved into this or did the scammer exploit some kind of vulnerability because I don't think the website offers hosting services.