If said companies are broken up how would that change what you've stated? There are plenty of small companies that pay a lot and offer free products that are not monopolies (if you believe they are, anyway).
There are many other companies that offer free email without relying on a "massive" ad business. Without knowing what you mean by a lot, but Dropbox, twosigma, most "unicorns" have an order of magnitude or more less headcount and offer similar pay.
Google is only able to offer services like gmail and google maps for free because of their massive ads business.
> There are plenty of small companies that pay a lot and offer free products that are not monopolies (if you believe they are, anyway).
Name one, I can't think of any.