It's your assumption that everything behind a google link ought to be 100% free (ad supported). Other people disagree, and Google does not advertise anywhere that their list is free content only.
> Google does not advertise anywhere that their list is free content only.
Google does advertise that they index based on the same content that's available to anyone viewing the page, and has policies against presenting a different version of the page to their crawler versus what you're showing to visitors.
It's splitting hairs at this point, but anyone visiting the page can view the same content as the crawler – if they pay.
Should Google also stop indexing Facebook, since Facebook puts a login wall for people to access their content? Should YouTube (ie Google) ban movie trailers, since it's just a tease for paywalled movies? The iTunes store let people listen to 30 seconds of a song before purchasing at the paywall. Was that wrong?
> Should Google also stop indexing Facebook, since Facebook puts a login wall for people to access their content?
Yes - I thought they already did? (I know LinkedIn edges around this by putting up a login wall only if you have a cookie showing that you'd logged in previously).
> Should YouTube (ie Google) ban movie trailers, since it's just a tease for paywalled movies? The iTunes store let people listen to 30 seconds of a song before purchasing at the paywall. Was that wrong?
A free sample of a paid thing is fine if everyone knows that's what it is. It's when you bait-and-switch by offering something that seems like it's free to start with that it's a problem. Like imagine showing a movie in the town square and then 10 minutes in you pause it and tell everyone they need to buy a ticket or leave.
No, it's not bait and switch. A book store has an index of books they sell, that doesn't mean they're free. I expect a high quality search engine to deliver paid results if they are the best results.
Should Google Maps remove businesses that charge for their products and services from their search results as well?
I wouldn't expect that at all, search engines search the content they have available to proffer it to you, that's the job.
If by clicking on the thing it does not have the content I searched for (how am I even certain I get it when I pay you?) I would call that result bad.
If you want to charge for stuff that's great, I recommend it, and if you want to give out a free sample or an index that's great, but it should be the same to all comers.