An email I got from Dominique from the Netherlands.
In the Netherlands we play something like Suction but it's a bit different. I also created a variant to play against 1 [alerted] which happens a lot due to the Dutch Doubleton opening.
The name in the Netherlands is MultiDefense
The last 2 are advised to be played with tolerance for the 3 playing level.
If opponents double the bid: Redouble means bid your colour, pass shows a 5 card suit in that colour.
Versus the 1 [alerted] opening I moved some of the bids from the otherwise natural sequence to a more effective position.