Amazon encouraging fake positive reviews on their own private label products

Solimo is a private label owned by Amazon India. There has been growing instances of fake 5 star reviews on the Solimo branded products. List of a few reviews on some products in cases & screen guards category are as below, all of the reviews are non verified purchase:

https://www.amazon.in/gp/customer-reviews/R3STQ57FE0YXO6 https://www.amazon.in/gp/customer-reviews/R2YR50CL2OAVJS https://www.amazon.in/gp/customer-reviews/R29N33NUE1J32J https://www.amazon.in/gp/customer-reviews/R1ZHBF39ABZ5YQ https://www.amazon.in/gp/customer-reviews/R1RRG47Q7R8XHI https://www.amazon.in/gp/customer-reviews/R13ZM7HJ9RVSZ8 https://www.amazon.in/gp/customer-reviews/R13Q0MHAOWJLZN https://www.amazon.in/gp/customer-reviews/RHIVQI4ALGS5A https://www.amazon.in/gp/customer-reviews/R1P8RHSXDST6IY (here even the picture in the review shows it's not the final product yet as the camera cutouts are pending, and of course non verified purchase)