It's pretty simple, really.
I don't share your data. I don't sell your data. I don't store your data. I don't collect your data. I don't want your data. I don't need your data.
"Mars Needs . . ." doesn't need your data.
"Mars Needs . . . " is my weblog. I tinker with it as a hobbyist and use it to chronicle some of my adventures as an amature astronomer.
"Mars Needs . . . " does not serve advertisements. It provides me no source of income. One could argue that since I spend time preparing the articles posted on this blog and that I registered the domain name, this blog costs me considerable time and money.
"Mars Needs . . ." is published by me for entertainment purposes and I welcome and enjoy interactions with its readers.
But, please realize, that by reading my blog, you are consuming my content and making use of a service hosted on Google's Blogger platform and by doing such, you are exposing yourself to all of the Googly things that Google does.
If you have subscribed to my blog to get notifications of updates via email, you have provided your email address to Feedburner. Feedburner is yet another Google service. When you receive a notification that there is an update to my blog, there is an "unsubscribe" link at the bottom of the notification. You may use that link to stop any future update notifications.