I recently received a mass CCed email from an Amazon seller to 70 other customers (hello GDPR?) offering free products in exchange for 5 star reviews. There's n

I recently received a mass CCed email from an Amazon seller to 70 other customers (hello GDPR?) offering free products in exchange for 5 star reviews. There's no proper channel to report this. Tried to leave a review with proof of it and it was denied. I really get the feeling Amazon are ok with it.