To start, "I like rain" is a factual statement derived from your opinion, not an opinion itself. So let's change it for "rain is good":

> If you think rain is good because it waters your garden I'd hesitate to call that opinion because you have a factual reason.

> If you think rain is good because it sounds pleasant that's an opinion.

You're making distinctions that don't exist.

Thinking rain is good because it waters your garden is based on the fact that it will help your garden grow.

Thinking rain is good because it sounds pleasant is based on the fact that you enjoy the sound of the rain.

Both of these ignore counter-factuals. Sure, you think rain is good because it waters your garden, I think rain is bad because I live at the bottom of the hill and all that rainwater frequently floods my house. I think rain is bad because I dislike the sound.

Your opinion is based on the fact most relevant to you, my opinion is based on the fact most relevant to me. Choosing which facts are most important is a personal choice that results in an opinion. They're all opinions! To finally bring the thing full circle:

> But Facebook supporting marketing because they make more money with marketing can be a verified fact

It is an opinion supported by fact. A Facebook exec could make the argument that they could make more money by dropping advertising and instead charge a monthly membership fee. There are definitely fewer facts available to back up that opinion but it would still be a valid one.

That's just your opinion. Others are of the opinion that corporations are in fact people and deserve all the protections that people deserve regarding free speech. Some such people even sit on the Supreme Court! Materialists would even go so far as to argue countries are conscious.

> Why do you want your government to have a belief not based on facts?

There's some kind of fallacy at work here, you're establishing what your personal definition of something is then arguing with OP while taking your personal belief as fact.

"Opinions are not based on facts" definitely isn't a universally accepted definition of an opinion. An opinion doesn't have to be based on facts but it's not precluded from it.

* online advertising allows consumers to learn about new products and services

* advertising incentivizes user data collection in order that it may be more effective.

From just these two facts one could easily come to a pro- or anti-advertising position based on their values and the relative weights they choose to put on each fact.

You may like thier products or services but that's not the same as liking the corp itself.