The minus button was removed some time ago. There is a thread where this was discussed, see more information here:
https://www.gog.com/forum/general/minus_button_removed_from_comments

Negative rep builds character. ;p

Actually mine are rather "ranty" to say the least...... :D

Latest example, my review for "Daggerfall Unity", it's one of the worst games ever. Simple as. And a lot of other reviewers agree. But they are 100% negrepped. Not a single posrep. Actually, some do have one now, from myself. Yet 5-star reviews that just say "thank you gog" have mostly posreps. I want to smash my monitor sometimes!!!!!!

As for negreps building character, well maybe, when it comes to psychopathic homicidal character!

[Modded. Don't be rude towards others please.]

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@OP - Things have definitely been greatly improved here since the disablement of downvoting. I don't miss that ability at all, even though on a rare moment, cough cough see above, I almost feel like downvoting some irritating or obnoxious post.

If some poster gets too irritating, I will just permanently hide them.

In a way, it is a bit like DRM. We all get penalized because of the few who do the wrong thing. Those few should just be ignored, and we have no DRM, which will improve things for the far greater majority. Those who impose DRM are almost as bad as those who do the wrong thing. In some ways they are worse, because they pretend they are doing it for altruistic reasons, and that they are such goodly folk.

I found one review of yours for "Daggerfall Unity". It's the one where you spelled "feces" wrong in the title and used the word "LOL" once with 14 Os and another time with 15 Os. Your review has received one vote, which is positive. If I was interested in this free game and was looking for reviews that guide my thought process, I'd give that review a thumbs down, and it's really not because I don't like a tasty hot takedown piece. I love those, even when I actually adore the reviewed game. But this isn't a helpful review.

Was this the reason you were gone from the forums? I'm asking because i, for one, enjoyed your excessive thread making so i wondered what exactly caused you to stop. I figured you don't care about the downvotes because you kept making threads, but apparently i was wrong?

For curious minds https://www.gog.com/forum/mysettings It has been observed to decrease for some people for unknown reasons, possibly an echo of downvoting bots, not sure how is it going up in line with kudos +1 or is it just posts counter now. Anyway... I am so happy too! ^

[Modded. Don't spam or be rude towards others.]

How do you know it was 5 people? and am I one of them? please tell me I was one of them

Not my fight. You've played the game, you're entitled to an opinion. If you had not played the game it would be a different matter. If you plainly lied about some things to make a game look worse than it is, it would be a different matter. If you had spread pathetic conspiracy theories about the developers, dragged obscure political issues into your review, or if you insulted other reviewers/players for liking the game, that would be a whole other planet of a matter entirely. All that would be my fight. But you just shared your honest impressions, as negative as they may be.

Why, thank you for your kind words.

I still love GOG and I have not abandoned the forum. I just took a break for a couple of reasons. For instance, the fact I took a liking to films, and they overtook games as my main "recreative" hobby for a while.
Is that a veiled threat?

You're not a troll, so you shouldn't feel threatened. Right?

Good riddance from me too. +1 OP.

The limited 1500 character space GOG allow for reviews meant I had to omit some of those sentinments! :)

Yes, I wholeheartly agree. "Removing" (or hiding, whatever) minus for reputation was a good step, but reviews also need this step.

At this moment reviews have so many issues with "negative reputation" for reviews

a)Questions asked for every review is about helpfullness of review, yet in practice it's turning into answers for "do you like this review" (or being more specifically - do you agree with this review"). And in MANY cases those "minusing" users don't even bother to read the review - just seeing low score is enough to click on "minus".
b)"vindictive" users, who are hoarding to minus some user, who they don't like
c)There are also some utterly prepasterous reasons why part of users are minusing the review, and one of them is the fact, that the review is... is other language than their own (not kidding, those people don't bother if they turned on the filter basing on language or not).

Ok, to make things fair, some of those phenomenons are not that often (e.g. minusing for language), but some of them became a plague (minus for review with low score for the game).