Thank you for the review. We indeed reward candidates after they complete coding challenge with 100 euro Amazon Certificate or we transfer 100 euro as a reward if they are able to invoice us. If you requested Amazon Certificate, it might be possible that it is "stuck" in the Spam folder, which had happened several times before. We are sorry for your experience and we'd like to help to solve the issue if there is something pending from our side. Please reach out to our tech recruitment team directly via yulia.bondar@castoredc.com or eveliina.petajaaho@castoredc.com and we'll be more then eager to clarify the situation.