I wonder if it is a local/regional/one-off marketing thing.
A few years ago our local Coop had Henkel's Dixan as a one-off discount, sadly never to be seen again (here, at any rate). Cleaned fine, not a terribly great fragrance, but acceptable.
I've seen the Senti-mat on ebay once but never the Prudax or others, whish I could find the Prudax and some others though.....I'm very curious, the TAID makes me laugh, I don't know the pronunciation in German or French but here in italian Taid is how an english speaking would pronunce Tide! LOL
I bought a box. It cleans really well, doesn't suds up and rinses out easily. It doesn't include a scoop unfortunately.
The scent is somewhat unusual and not something I'm really keen on, however the cleaning quality is outstanding for the price so I can't complain really. It's cleaned everything I've thrown at it including stained tea towels and white socks