I read on here about knowing or identify how serious a project is through their github home but here is my doubts, should I start considering every projects that failed to release their GitHub home to the public a scam project? Does all top 10 coins on Coinmarketcap has GitHub home? I need answers to empower my knowledge further, thanks
If the source code is publicly available (on Github or not), anybody can check the source code for bugs, back doors and such; also anybody can build and run the source code as a safer alternative (provided you understand what's there vs some executables which may contain anything).
So the public source code is a plus. Source code on Github, where people can even follow the evolution and fixes, is another plus.
But that doesn't automatically make closed source projects a scam.And I will give you a simple example: just think of a miner software. Somebody may make the miner with developer fee. No source code, since if he'd publish the source code, others will build it without that fee. Somebody else may make a fake miner, which tries to steal your coins, but advertises it as a miner with lower or no developer fee. Why would you trust one and not the other? Hard to tell. But if a 3rd developer makes am miner and publish the source code with it, people will use this one and maybe even donate or help improving it.