So I actually emailed them with feedback. They were nice enough to answer with a picture, which highlights on it's own what a terrible UX their website has...
At last, Onyx Pioneer.
To finish this one in style I decided to go to IJmuiden Zuidpier for the final capture. A well known coastal portal 'only' 1 hour of cycling away from my home, yet I had never been there, reason enough to visit.
Dutch guy escaped to Switzerland. Golang, C++, whatever language suits me at the time developer and hobby sysadmin.
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