No, most companies don't sell gift cards for other companies. 

You can buy Amazon gift cards from Amazon, though. 

No, Razer primarily sells its own brand of gift cards, which are typically used for Razer Gold, Razer Silver, or Razer-related products and services. They do not typically sell third-party gift cards for retailers like Amazon, Nike, or others. However, you can find those types of gift cards at many other retail stores or online platforms.