You're speaking in generalities. This site is dealing with real people, such as a man who wants more sex from his girlfriend (apparently the most requested "ad") and so secretly signs his girlfriend's phone up for a system where she is shown ads designed to manipulate her into giving her boyfriend what she wants.

You don't see how there's an ethical difference, between that and a corporation advertising its products towards a general demographic?

I'm not clear here: are you using this as an argument in favor of spinner and their service or as an argument against targeted ads because they're basically just this spinner on a larger scale?

If the latter, I'm with you.

I am against targeted ads at all scales because we have a lot of fallacies that we cannot really control all the time even if we are aware of them.

But the reactions to this service is slight proof that an organisation evokes lesser negative reactions than an individual

I think the greater reactions are due to the targetting of individuals rather than the entity acting.