What monetization options for various sites have you seen?

Question

Monetization

More interested in sites that obviously do not sell anything, but they also want to eat)

Answer 1

Paying for hiding ads, for example. I met forums where you could get more emoticons for a penny. For a long time in chats I saw how for money people could highlight their nickname in bold.
In fact, there are a lot of options, you need to understand the direction of the resource. In online cinemas, for money, you can give the opportunity to continue from the place where you finished watching or remind you of the release of new episodes of your favorite series. On news portals, you can give the opportunity to postpone the news for later (like the "watch later" button on YouTube). If this is a kind of social network, then all sorts of emoticons / stickers / gifts, there is a whole VK of examples.
In general, specifics are needed, specifics.

Answer 2

Google: Reselling in-demand content (ads/apps/articles/etc.), selling API access with different conditions.

Answer 3

Yes, there are only three options: sale, advertising, services
- everything is clear with the sale, you look for a niche and sell what is in demand there: books, clothes, cars, etc. Another option is to sell additional project functionality - for example, "gifts" in VK or donate in games.
- advertising: it can be different, but the meaning is always the same - to get your visitor and perform some actions with him (tell him about the product, make a sale to him, install a Trojan for him, etc.). To make money, you need traffic on the project.
- sale of services: when you make some kind of service that is useful to everyone and you take money for using it or for discovering new opportunities. For example, file storage (dropbox) or electronic currency exchange
Of course, there can be sooo many varieties, but they all come down to these three points