Thank you for your question:) Danke!
Any post, in any community will appear in the feed of the people you follow.
Reblogging it makes it more visible because:
When someone goes to your profile > hive.blog/@katerinaramm - you dont see all the posts by default - you need to click on the Posts to see the posts shared also on communities. For instance I have posted a few actifit posts, which remain in the Posts tab, but not in the Blog because I have not 'reblogged' them.
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alright, thank you very much for clarifying.
I thought this was rather a bug of (modern) Steemit and Hive than a feature...