Do yourself a favour and search HN for people's stories about their BigCo accounts for paid services being closed for no apparent reason. Most of the time these are accompanied (by design) with no way to getting beyond automated denial bots.
The tired trope of capitalism ensuring that all customers will be served needs to die. Businesses always evaluate any additional revenue against the cost of getting that revenue.
There are a multitude of ways in which the cost can exceed the revenue. The mundane example is that it's more expensive for Google to maintain non automated support for 'non core' services. A more harmful example is the practice of 'redlining' after the great depression where largely due to non financial reasons, the 'cost' of providing mortgages to non whites was deemed larger than the expected revenue from those mortgages.
> Businesses always evaluate any additional revenue against the cost of getting that revenue
nit: this is still coming from the vein where businesses are taken to be super-computational agents/oracles. whereas really there is a lack of evaluation of the possible revenue being left on the table, and the focus is on what has already been found to be profitable.
This happens all the time for various reasons.