How are essays scored by the ETS software? If I submit my essay here, will the software pick it up so I won't be able to use it again?

Hi, I am taking the GRE test in a few months, I was wondering how the ETS software scores the essay. Does it look up similar essays on the internet?

Say that I publish an essay here, and also use it for the actual test, would ETS be able to pick it up and count my actual essay as plagirism?