I remember a couple of TV programmes explaining the situation, with interviews to not only Spaniards but people from other countries too, who were living in Portugal for a few months and/or buying houses there. There was even an agency with travel plans etc. so they managed everything and holders simply enjoyed their vacations.
I know that there are agencies that help in this process. But I had no idea that Spaniards linked to crypto were coming here. The fine is also usually discreet and therefore ends up being normal.
I also believe that most of these people don't come to more urban areas, like Lisbon. Prefer to stay in Alentejo and Algarve (warmer weather and better beaches).
I guess that this is because, between Portugal and El Salvador, the former is much nearer from us and the language is not a big problem either

.
As far as I know, yes, people tend to go more to coastal or touristic areas rather than the city. The plan normally is to go there and enjoy while others take care of their business and amusement for 6 months in some good paid holidays, much cheaper than simply staying at home in their homeland.
Linked to the title of this thread, some people do this and buy a house in Portugal directly, but others simply move there for 6 months to withdraw and buy the house in Spain. Here, as long as you paid your taxes, you can also buy the house with Bitcoin (a colleague from the Spanish board did it).