By language analysis I more so meant comparing them to past posts if there was any, or comparing the posts to each other in terms of whether the typing is similar/the same, rather than "They have the same general theme", because that's going to happen in a thread where people are reviewing a product/giving their opinion on one-- you post the backstory for establishing a credible opinion/what level of play you're at, you tell why you do or do not like the site(there were plenty of people who posted a backstory that had negative things to say too), and the feedback seemed to vary from constructive to just "This is a good/bad site" depending on the user.

For a good example by the way, take account https://www.reddit.com/user/dionysian79

They have a pretty unique way of using the - in place of a comma where normal people would put it(more often than this usually happens anyways). This is observable on both the /r/competitiveHS post and the /r/poker post. You could make the argument that the person who bought the account noticed that and intentionally placed the dashes in just in case a thread like this was made and someone could point out the dash... but that's getting a bit tin foily at that point.

On the contrary, an account that kind of proves the OP's point potentially would be https://www.reddit.com/user/wqerc13 , for their older posts using 100NL while the newer ones use NL100.

These are just small details and don't really prove anything either way, but that's my point-- it's mostly just speculation, and it's really hard to buy into this idea with a relatively small amount of actual proof other than the fact that it's a bit fishy available.