I have read couple of submission guidelines and publisher notes that pays on the "word" unit for descriptive essays, articles and lists. (For ex, 2₹/word). Then there are different guidelines for poems - that weighs the value over number of lines used and number of constraints followed. (For ex, strictly 10 lines).
But I am confused about the units itself. What exactly "word count" counts - all the words in the submitted article including a, an, the, conjunction etc? How does number of lines determined in the poem - the line after a punctuation mark like Question mark, Exclamation mark or full stop?
Who decides the prices? Is there any standard out there that shows today's price of one word is 1₹ (like daily fuel prices)?
What, in general, are other standard parameters a submission goes through during monetary evaluation?
Please note, I am not talking about a novel or such long publications. I am talking about single essay/article, or poetry submissions.