Google has great customer service if you're regularly dropping $10M on ad buys - you get a personal sales rep who takes you out to expensive dinners and does all the normal wining & dining of high-end business. I've heard GitHub is similar if you purchase their on-prem Enterprise product.

That's my point about moving up-market: it's not that the self-serve product has good customer service, it's that they create a division within the company with all the customary trappings of B2B sales & support and then leverage their consumer product as free marketing & engineering.

Github's rep is probably worse than Google's.