How to get lightning link casino free coins?

Could you elaborate on the methods available for acquiring free coins in the Lightning LINK Casino? I've heard whispers of various strategies, but I'm not entirely sure which ones are legitimate and worth pursuing. Is there a specific way to earn coins through in-game achievements? Or perhaps there are promotional offers and bonuses that can be claimed? Additionally, are there any social media campaigns or referral programs that reward players with free coins? I'm particularly interested in understanding the most effective and reliable methods to increase my coin balance without investing real money. Could you provide a detailed breakdown of the steps involved in each method, as well as any potential risks or limitations to be aware of?