Follow up: apparently I was sent an email giving me details and password of an account created on my behalf so I could edit my entry.
Sadly, it never arrived and I missed the opportunity to visit a web site I've never heard of and log in to an account I never created.
FFS!
OT: Sadly, such behaviour is not limited to the Wargames industry. The company I work for was once listed in a "disposal service portal" created by a former sales operative who didn't make it through their probationary period (or didn't stay on thereafter, good riddance in any case), followed by mails and letters oh-so-politely listing how many people had (allegedly) seen our entry and wouldn't we want to upgrade to a "Pro" account for the respective fee.
You have to marvel at the guts of some folks. But I guess that's why they are in sales.
Still, especially on the hobby tangent, I find the behaviour rather disingenuous. Thanks for pointing it out, I've taken the liberty of expanding/clarifying the topic title a bit.