Hi!
Yip, I can see that it is your own work but unfortunately to enable you to receive support it must be #steemexclusive and in Steemit it all goes about getting support so that you can earn on it.
For example, I could have submitted your post for a booming vote which will increase your earnings but I can't as the rule is that the post must be steemexclusive.
Here is an article for you to read regarding #steemexclusive.
https://steemit.com/hive-185836/@o1eh/when-to-use-the-steemexclusive-tag

As for plagiarism, it is required of us as admin, moderators, and curators to check all posts for plagiarism with a tool like https://www.duplichecker.com/ With this tool I found your 2nd post on tumblr.

Now, you can continue writing on both platforms and not use #steemexclusive but you will receive very little, even no support.