For my specific use – making Fallout 4 and Valheim playable on a bus ride – the was worth the $15. Just buy from the official site to avoid scam keys.
Here’s a review written as if from a gamer or software user who tried a product claiming (likely a performance optimizer tool for gaming on weak PCs). Review: Low Specs Experience Premium Key 2023 – A Lifesaver for Potato PCs, but Know What You’re Buying Rating: ⭐⭐⭐⭐☆ (4/5) Price paid: ~$15 (via reseller, Premium Key 2023)
Run their “System Readiness Test” first – it tells you if your PC is too weak even for their tool (yes, that happens).