No, no, I only block the Whois data on one website, which is just a fun blog I do to make people laugh in my small community in Florida. Being anonymous is half the fun ![:) 🙂](https://moz.com/community/q/assets/plugins/nodebb-plugin-emoji/emoji/android/1f642.png?v=4jds23d1a2r)
What I try to do when I create mini-sites is somehow provide value to the users - that's the best policy. If you create a mini-site ONLY for SEO, you're not going to add much value. But if you create a mini site that gives your users something different than they can find on your main site, you'll be adding value and SEO value as well.
Here's a for-instance. Let's say you are a mortgage broker and your primary website has tons of content on mortgages and the call to action is to submit an application.
Then, you create a mini site that has a ton of generic info and calculators for mortgages, and has listings of data in whatever location you're focusing on ranking your primary site.
This mini site could be a simple Wordpress install and wouldn't take too much work, but it's adding real value for your users.
Does that make sense?