Yeah, that's not particularly great but isn't that what other social media networks do as well? Assuming you do use other social media.
The types of interactions that you only want to share with a small crowd or a few friends.
All that goes out the window if you're just going to sell all my personal thoughts that you want me to share with my friends.
We've amended the privacy policy by adding this statement to make things far more explicit;
Sundayy does not, and never will, rent or sell your personal data to any third party for any purpose (including advertising or marketing purposes) nor do we, or will we, permit targeted advertising on our Service. We only share personal information with third party service providers under limited circumstances as described in the section below.