Free things are not really "free". They come at a cost, here some examples:
- "Buy 3 and get 2 for free": You clearly paid for the 5, but you will maybe tell your friends about the offer, bringing more people to buy.
- Youtube: free videos. You watch advertisements, you subscribe, you are the audience that will make more creator using Youtube instead of other platforms, you share videos with your friends, which brings them to Youtube.
- Facebook: free account. You are giving them data like your interests, likes, so it can be used by advertisers paying Facebook to target people "like you". You invite more friends to join, or people join because you and the rest are already using it.
- Free samples: they make you more likely to buy the product, mainly if you like it (for some people, even if they don't like it, they may feel like they "have to" buy it because they got some for free)
- Free eBook: please enter your email and subscribe to out newsletter to receive the free eBook.
- Free birthday present from a friend of family member, many times, are the reason why you will also buy a present for that person's birthday.
- Free drink because a friend paid, you better pay the next round
- Free social services (paid from taxes, probably yours too)
Regarding your main question:
How could some profit from the economy of free things, and what would the reaction to this opportunity, by the general public, be?The "some" who could profit could be the general public themselves, or companies.
I could go broad as I did with the examples above, but I will focus on Cryptocurrency Airdrops, which is the main topic.
- The reaction by the public is usually good when it comes to free Airdrops. To note that if they don't provide value in return to the project doing the airdrop, less airdrops will happen in future, so the general public can't just take the money and run, as this will only lead to no more airdrops in the future.
- Getting 5 times more free coins doesn't make you feel 5 times better, which is why projects can get the best results by giving very little per person, getting much more people "on board" resulting in more people contributing by providing value to the project.
- Projects can profit by getting data from the general public, with their permission, on exchange for the "free" airdrop.
- Projects can profit from social proof, so they are able to say "we already have 10000 people on our community". However, if the community is not active it is an issue. The project has to find the way to make the community give value on exchange for the free airdrop, more than their email. Their actual attention (who reads emails?) would be enough, so that people learn of the news from the project and get more engaged with time.
I hope that kind of answers the main question, looking forward to see how the debate continues.
Something interesting:
When given the option, would prefer an Iphone 3 for free than an Iphone X for 100 USD.
However, if the Iphone 3 is 5 USD and the Iphone X is 100 USD, most people will choose the iPhone X this time, which is more rational.
Great video in Spanish which shows this happen, with cheap/expensive chocolate:
https://youtu.be/xmiL94yx28U?t=10mThe video is for free
Enjoy it.