User with multiple accounts and vote manipulating?

https://www.imdb.com/user/ur6387867/?ref_=tt_urv

https://www.imdb.com/user/ur115536310/?ref_=tt_urv

I've seen the same two users at the top of many review sections. They both have 13 at the end of the name, same scores, and similar number of votes. The only difference is the content of the review.

You should look into this.

some examples:

https://www.imdb.com/title/tt13062500/reviews/?ref_=tt_ov_rt

https://www.imdb.com/title/tt11041332/reviews/?ref_=tt_ov_rt

https://www.imdb.com/title/tt13111078/reviews/?ref_=tt_ov_rt