[egsmi]

> Businesses are not dumb.

Over all businesses over long periods of time, maybe. But a business can definitely be dumb. And a smart business can definitely do a dumb thing.

[tehlike]

"some can be" and "all are" are different things. There are a lot of businesses that don't keep track of their finances, just like there are many people who don't. But assuming that's de-facto situation and every business is losing money on ads is cynical thinking.