Meaning:
“人民币” is the English for “RMB,” the currency used in China, and “玩家” refers to a “gamer.” This term, often used by gamers, refers to those who are willing to spend big on in-game items such as fancy attire, armor or secret weapons that will easily dazzle or beat other gamers. In a more general use, the term can refer to anyone willing to pay extra money to enjoy a privilege in real life, like those who pay more for an express card in Disneyland which allows them to wait less time in queues.
Example:
A: 你之前很着迷的那个游戏还天天玩吗？
Nǐ zhīqián hěn zháomí de nàge yóuxì hái tiāntiān wán ma？
Are you still playing the game you were once obsessed with?
B: 已经不玩了。因为我不是人民币玩家，玩到一定级别就过不去了，然后我就觉得没劲了。
Yǐjīng bù wán le。Yīnwèi wǒ búshì rénmínbì wánjiā，wán dào yīdìng jíbié jiù guòbuqù le，ránhòu wǒ jiù juédé méijìn le。
I’ve already quit. Because I am not one who would spend big on in-game items, I got stuck at a certain level. Then I lost interest.