This was exactly the reason we used Bitbucket in the beginning, even if it was worse in some aspects. Github would have been simply too expensive (or restricting) with our "it's always in source control" approach, even for smaller prototypes.

We're happy Gitlab users now by the way - and I'm curious how long Github will survive with their over-valuation as the alternatives get seriously better now - the lock-in and network effects are quite shallow IMHO.