For someone who's used the Internet Archive rather extensively for years, I find this troubling, An increasing number of news providers are beginning to block the Internet Archive (Wayback Machine) from archiving their news articles! I think this sets up a kind of threatening scenario of suppression of accurate access to facts, access to what really happened or had been reported originally. Online articles are often altered over time for whatever the reason, the internet archive allows you to go back and distinguish in what way narrative might have been altered from the original when first reported- which happens frequently enough.
Many news outlets are reportedly blocking Wayback Machine from archiving their pages, apparently because they fear that AI companies will abuse fair use policies and train their models on the snapshots of old articles. ...
.... It could be argued that the newspapers and publications themselves could handle their own archiving, but it’s in the public interest that a neutral third party handle record-keeping. After all, it’s easy to change online articles to change the record, and while many outlets are trustworthy, some are also owned by big corporations that could potentially benefit from the control of the historical narrative...
...Wayback Machine director Mark Graham is reportedly in talks with several outlets so that the archiver’s bot could gain access to these websites once more, while a coalition of journalists and other stakeholders have signed a letter in support of the Internet Archive and its mission of providing universal access to all knowledge.
I've used the Wayback Machine extensively, and support their efforts.
However, it's also fair to note that they don't get everything, even if they can access these various sites. The Wayback Machine works by archiving static web pages and their links (which also have to be static and accessible).
Many sites automatically generate web pages from applications and databases, and store downloaded content also on those databases. The Machine can't get easy access to that.
So you don't have to block the Wayback Machine to stop it from archiving data. Just 'hide' the data behind some sort of application and/or database wall, and that does the trick.