Paid reviews?

I detect a pattern in the reviews for these books:

https://www.librarything.com/work/23925983/reviews
https://www.librarything.com/work/36850324/reviews
https://www.librarything.com/work/19051602/reviews
https://www.librarything.com/work/36850324/reviews
https://www.librarything.com/work/36850393/reviews

by these members:

https://www.librarything.com/profile/Mizan-Miyad https://www.librarything.com/profile/Mahmudul-Hasan https://www.librarything.com/profile/Mohammad_Irfan
https://www.librarything.com/profile/Tayef_Sultan
https://www.librarything.com/profile/Afran_khan_Shihab
https://www.librarything.com/profile/AsikAhmed
https://www.librarything.com/profile/Zakia_Afroz
https://www.librarything.com/profile/Taa_Mim
https://www.librarything.com/profile/Md_Faysal_ahmed
https://www.librarything.com/profile/Iffat.ara.Khalil8764

I’ve flagged the reviews, but I’m not sure that will go far enough to discourage this trend.

I'm tempted to flag the profiles, but I think you should report this to info@librarything.com

If there's a pattern, they may need to tweak the spam detection system.

I wonder if these are all from a class or some other SEO issue.