In the fee-based model, the needs of the following must be met: (1) the company, (2) the users.
In the ads-based model, the needs of the following must be met: (1) the company, (2) the advertisers, (3) the users.
By removing the advertisers from the equation, a lot of resources are freed up to address the needs of the other two parties. It's kind of strange to say that "the company" is a party being serviced in this manner... they're asking for cash, and people are giving it to them for a service. Yes, they have needs that require resources (think administrative assistants, HR, sales, etc), but these people all exist to help service the user. To that extent, the majority of the company is now existing to create a better experience for the user. Their argument is that this is significantly superior to the model where a significant portion of the company exists to service advertisers, and not benefit the end user.