This is not uncommon.
I have had two "star letters" published (neither of them in PCA I hasten to add, my deathless prose is not that good!) but have not received the "reward" from either, nor any reply to enquiries.
Huawei P10 review
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New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.