based on my month of pure gamedev I found regular updates get a ton of engagement, and new followers. You could try keeping it really secret and rely on the followers you have. or you could find a balance:
post cryptic nonsense about your game that will all suddenly make sense when it comes out
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Ok, ok, to elaborate try hints without spoilers, so folks respond asking what you are making, that you can't disclose yet...
post cryptic nonsense about your game that will all suddenly make sense when it comes out
Your also doing both right now 👀