I don't contest that there are probably people who only need a remote git repo and nothing else. But those companies that would service them either compete on features or get pushed down to wholesale cloud storage prices, a place you don't want to be unless you're Amazon.
Paying for a service that can double or triple a developer's productivity - people say the UI on BB is still not as great, so that counts for something - must at some point justify that developer's time.
If you have enough repos that you'd need to spend $200 a month on a platform that offers:
- Wikis
- Basic Issue Tracking
- Source Control (and damn good source control at that)
- Integration with many popular startup tools
Trying to skimp on this is like telling your 10+ dev team to use google talk for offline coordination. Yes, you save money on chat, but you lose all that time I waste copy-pasting and coordinating chats between multiple devs.
For such people, Github is ridiculously expensive, since their price is based on the number of repositories you have. For instance, at work we've got enough repositories (all small) that we'd need the $200/month Github plan. In terms of storage costs, that works out to about $10/megabyte/month.
That's 5 ORDERS OF MAGNITUDE more than the market rate for cloud storage. When you are selling something 5 orders of magnitude above the market rate, there is room for competitors.