The first meanings mentioned in the dictionary of Royal Spanish Academy (RAE ) of the term scheme They are in disuse. The concept used to be used as an adjective that alluded to someone insightful, cunning or intrepid.

At present, however, ardid is a noun that refers to a hoax or a scam . A ruse, in this context, is an act that is performed with malice and ability to get a objective well determined.
For example: “With a ruse, two young people robbed an old man one hundred thousand pesos in Villa San Javier”, “To affirm that I have several legal cases is a ruse of the opposition so that people do not pay attention to my proposals”, "The alleged competition is nothing more than a ruse to advertise the new brand".
The tricks are tricks or scams . The intention is to cause confusion in another person to misunderstand a situation and do something that, in reality, you don't want to do. Take the case of an editorial that announces the organization of a literary contest whose prize is supposed to be the publication of a book. Writers who wish to participate must pay an inscription of 30 dollars to be able to present their texts. One hundred authors decide to register for the contest and the publisher, thus, collects $ 3,000 . When announcing the ruling, the organizers inform that the prize remains "desert". Thus, it is shown that the contest was a ruse for the publisher to obtain money Without even publishing a work.
Situations like the one described in the previous paragraph are very common, especially in the artistic field, since there comes into play the delusion of the participants for getting the dissemination of their works. Given the difficulty of publishing a book or a music album, for example, the chances of deceiving an artist with such a ruse are very high, and thousands of people have been collecting money for decades.
The Internet era has opened the door to new strategies for this type of crime , which stands out for its special trait of cowardice. Thanks to the possibility of hiding our true identity behind a pseudonym and the ease with which we can create a website, opening a fake company to carry out a massive scam plan does not present great challenges.
Outside the artistic or vocational field, the scheme can also occur in another of the most vulnerable foci of society: unemployed people. On the Internet there are many examples of fake jobs that are presented as "unique opportunities", which nobody in their right mind should refuse, and to access them the supposed employers require a small sum of money that justify sending an initiation package or carrying out different procedures.
Since it is a payment that even an unemployed person can afford, the plan It is practically infallible. This is just proof of the degree of cruelty and lack of consideration that our actions can achieve, something that can also be seen in activities such as spiritualism and healing.
In the scheme comes the cunning of the person who wants to commit deception. An old man can be visited by a man who claims to be friends with one of his children. Through a speech with round trips, he allows the victim to allow him to enter his house. Once inside, the offender informs him that he needs to collect a debt from his son: in this way, the old man, believing that he helps his descendant to solve a trouble , give the money to the scammer.