user22992: It seems to me that every new coin introduced, they list source code in Github.
Is that customary in the industry?

user-1: Most users are not going to trust a closed-source altcoin, so you should make its code available to the public. This board also doesn't support closed-source cryptocurrencies.
GitHub provides free hosting for open-source projects and has become a standard in the open source community so (primary opinion-based statement follows) it's probably a good idea to put your code there. 

22992: <p>It seems to me that every new coin introduced, they list source code in Github.
Is that customary in the industry?</p>
 -1: <p>Most users are not going to trust a closed-source altcoin, so you should make its code available to the public. <a href="https://bitcoin.meta.stackexchange.com/questions/629/suggestion-closed-source-cryptocurrencies-should-be-off-topic">This board also doesn't support closed-source cryptocurrencies</a>.</p>

<p><a href="https://github.com/blog/11-github-free-for-open-source" rel="nofollow noreferrer">GitHub provides free hosting for open-source projects</a> and has become a standard in the open source community so (primary opinion-based statement follows) it's probably a good idea to put your code there. </p>
