Twitch offered quite a few on-the-house games for Twitch Prime members in July. One of the games was even on my wishlist and two others I considered interesting enough to play. Amazon Prime is not a thing here but Amazon Video Prime is, and it gives you access to Twitch Prime the same way. Its 7-day trial fell one day short for claiming all the three games I wanted, so I paid for a month of subscription, which wasn't exactly a high price for the games either. (3€/month for the first 6 months)