This has nothing to do with their politics, it is simply the fact that they offer an alternative, people will vote for them because they don't feel represented by the other parties.
They are new, they are cool, they have an "anti-authoritarian" vibe, they will achieve nothing and be forgotten in a couple of years.
The funny thing is, the "Greens" are considered old, they have achieved nothing (there's still a massive oil dependency, there are still nuclear reactors, ...) and now they panic :)
Edit: the Pirates can gain traction by promising people "if we only had the power, we could do this or that" and they can increase their popularity by simply critisizing the current parties in power ("we would have it done some other way, we would have [insert popular opinion]") but in the end they will change nothing, just read up on the history of the Greens and just replace the name with Pirates
They are new, they are cool, they have an "anti-authoritarian" vibe, they will achieve nothing and be forgotten in a couple of years.
The funny thing is, the "Greens" are considered old, they have achieved nothing (there's still a massive oil dependency, there are still nuclear reactors, ...) and now they panic :)
Edit: the Pirates can gain traction by promising people "if we only had the power, we could do this or that" and they can increase their popularity by simply critisizing the current parties in power ("we would have it done some other way, we would have [insert popular opinion]") but in the end they will change nothing, just read up on the history of the Greens and just replace the name with Pirates