Could you please elaborate? I have never seen them described like this.

Rating: Mixture

What's True

Susan Rosenberg has served as vice chair of the board of directors for Thousand Currents, an organization that provides fundraising and fiscal sponsorship for the Black Lives Matter Global Movement. She was an active member of revolutionary left-wing movements whose illegal activities included bombing U.S. government buildings and committing armed robberies.

What's Undetermined

In the absence of a single, universally-agreed definition of "terrorism," it is a matter of subjective determination as to whether the actions for which Rosenberg was convicted and imprisoned — possession of weapons and hundreds of pounds of explosives — should be described as acts of "domestic terrorism."

https://www.snopes.com/fact-check/biden-forgot-defense-secre...

Rating: Mixture

What's True

A video shows Biden fumbling his words and apparently blanking on Defense Secretary Lloyd Austin's name at one point in the speech, although he had mentioned Austin's name a few minutes earlier without issue.

What's Undetermined

It's unclear whether Biden literally "forgot" his defense secretary's name at that moment, or whether, for example, he got stuck doing an extended "folksy" ad lib after initially tripping over his words.

The plagiarism accusation is interesting and should be resolved, but isn't evidence of misinformation or evidence that they are less reliable than [no known alternative] suggested by critics.

https://www.snopes.com/fact-check/fox-hunter-biden-porn/

They have not updated the fact check.

Here's a story with a video in which Hunter Biden himself claims Russian drug dealers stole another one of his laptops for blackmail. And 'The Russians have videos of me doing crazy f**ing sex!

Source with the Video: https://www.dailymail.co.uk/news/article-9881213/Unearthed-v...

https://www.snopes.com/fact-check/trump-tell-supporters-stor...

I'm so confused!

Compare:

  It was a subjective call on whether ____'s use of phrases "you have to show strength" and "demand that ____ do the right thing" were meant to condone violence and crimes among ____ extremists without explicitly encouraging it. 

  ___ said they should “stay in the street,” “fight for justice,” and “get more confrontational.” But there was more context to ___ remarks, and ___ didn’t call for violence, nor did ___ words incite violence.

The first is from the article on Trump you cited (rated "Mixed").

Second quote is from an article about comments by Maxine Waters on George Floyd protests & LA riots (of which she explicitly said, "I call it a rebellion") https://www.snopes.com/fact-check/maxine-waters-comments/ (rated "False")

The pattern seems to be: If there's a way a favored speaker can be taken positively, that will be explained. If there's a way a non-favored speaker can be taken badly, it will be called out.

https://www.npr.org/2021/02/10/966396848/read-trumps-jan-6-s...

And also for linking the daily mail

Oh, they said Trump told the truth when he said "Murders this year have spiked 27% in Philadelphia."

https://www.politifact.com/factchecks/2020/jul/24/donald-tru...

Why didn't anyone remind them of their bias before this got published?

Because there was no widespread vocal opposition to Snopes until Trump supporters started calling it "fake news" for debunking his claims about his inauguration turnout. Now they come out of the woodwork with every mention of the site to call it liberal propaganda and whatnot. No one else cares about the site that much - it's entertainment at best.

The widespread vocal opposition to Snopes is not simply from Trump calling it fake news, if anything his was a response just like the rest of us, a response to that organization plainly and blatantly lying to their readers repeatedly.

I'm sure there are some people who don't like Snopes for whatever other reasons but it's obvious that much of the modern resentment against the site is driven by a political agenda.

If Trump makes a huge number of false statements during his tenure as the president he's going to get the attention of fact-checking sites...

If Trump makes a huge number of false statements it should attract the attention of everyone. People that delegate their own critical thinking to an entity claiming to be unbiased and informed in doing it for them are going to be misled one way or another.

https://www.snopes.com/fact-check/trump-video-insulting-supp...

According to you, they are wrong, though. Ignore evidence to the contrary.

https://www.snopes.com/fact-check/trump-wear-pants-backwards...

Snopes says he wasn't, and shows evidence why. That's just "pure, unadulterated bias" though, right? His pants are on backwards?

Otherwise "I see Snopes as pure, unadulterated bias" would be such a broad generalization it's meaningless!