It's not. I've had my birthday set since forever and still can see the warnings. Once per HTTP session, as I've mentioned initially.

Well, not for me. Then I guess it's just the usual half-baked and inconsistent GOG technology. ;)

Indeed what about those who self identify as over 17?

Thanks, but I think the information we really need from GOG staff at this point isn´t whether the feature is new, but:

1. How exactly does the warning system work? (I have my birthdate set in my account but when using Galaxy, I get the warning every time I click on a game, not just once per session)

2. Will this be all or is GOG planning to implement further age verification systems / blocks?

Here´s some educated guesses for my fellow GOG users as to what´s going on: As far as I can tell, the warning comes up depending on the age rating a game has in the GOG catalogue (which might be different from country to country). For example, I get mature content warnings for the Overlord games, both of which have USK ratings (German ratings board) of 16+ shown on the store page. I don´t get a warning for Graven, presumably because that game has no USK rating on the store page yet, as it is in development.

This might even be preparation for including an automated process in line with the IARC system. For those who don´t know: For a couple of years now, there has been an international effort to create an automated age rating system ("International Age Rating Coalition") where game developers can fill out a questionnaire and get a sort of preliminary age rating, depending on the laws of the country they want to publish their game in. That way, devs can release their games with an age rating even if they haven´t had their games reviewed by the respective organisations (like USK, PEGI etc.) yet. As far as I am aware, some countries already have legislation which requires games stores to implement this system - and yes, Germany is one of these (new "Medienstaatsvertrag" introduced some months ago), but I think other countries in the EU are also planning to create such legislation.

those will take a test to confirm they were born as one

strange how human behavior can follow a common trend
we should make decisions based on this like only 20% should vote 80% not

Yep, me too.

I self identify as 16. Wut.

On a serious note, got the warning for Cuberpynk last night because I got curious and checked.

Trust should never start on the internet. Imagine the Wild West, ruled by opium den magnets, presided over by beelzebub. Well that somewhat close to how bad the internet is.
In terms of your question, some people have said they don’t get the warning when they have their bday set. I haven’t had the message and I have a fake day month. So it should be the same, perhaps it’s session based, not logging out and in to find out though.

I had cherished some hopes that this new "feature" will allow me to watch the movie on the Mad Max game' shop page.
No luck, though.
Despite having my birthdate in the settings, and clicking OK on the mature content warning.
Come on,gog, I am over 50 now.

It's not GOG's fault, the trailer is on YouTube.

You are too old to watch it ;op

So why they won't be after downloading it on to server of theirs own?

He's being sarcastic and parodying GOG fanboys.

This is a minor, but poorly thought-out implementation. DOB should've been what the check is based on with this warning only applying to accounts without one.