Dude. It's all about the article relevance and first upvote. If it's posted by you and you have stacked first and admins find it relevant and if they upvotess. In that case you'll always get more coins even though if there is high amount of coun stacked till the end of third day. Yes, If someone stacked first more coin (i.e 10k) then ofcourse you'll get less coins. So try to post relevant article by yourself.

That’s not a question. That is just how it works. The goal is NOT to give you REL, but to incentivize the rapid discovery of genuinely relevant content. If you had shared that and staked everything on it and it is relevant you would be rewarded quite differently. Piling on to an already relevant or highly staked piece adds little signal so there is little reward.