Simply state that it is from an open source archive!
We talk about boosting a lot in the Ecency Discord.
All posts submitted to Ecency for boosts are curated manually.
Curators look for quality post that show effort. More than 50 words and 3 photos.
Never ask for a max boost for a low effort post.
No template type posts.
All posts should be new. 1 or 2 days old.
Hope that helps you decide which posts to boost!
Come join us there! https://discord.gg/nQwBfcWW
In FAQ under why Boosts are refunded is more information.
https://ecency.com/faq