Seems they, like YouTube, don't want the uninformed masses to stumble across truth on their TV.
If I go to Pluto.tv from my computer, which I just tried now after your reply, I see that the conservative news sites that you had listed do indeed have streaming content on the computer.
But, the Pluto Smart TV app on my Samsung TVs, as of about two months ago, has an indefinite wait for streaming content to start and never does. All other Pluto channels work on the Samsung TV Pluto App, all but the conservative news sites.
Youtube blocks content, including conservative political content, from the YouTube Samsung App, I've seen this numerous times. The TV app has no search results for certain contents, but it can be pulled up on a browser Youtube session on a computer without a problem.
I would like to hear from others using the Samsung Smart TV Pluto app, if the same conservative news feed blockage is experienced.
Looks like it may be something Samsung is doing. Otherwise, if Pluto was wanting it blocked they would simply drop the channels from their line-up.
I am using the Pluto app on the Roku box and they are there.
I’m wondering if this will continue - since Pluto is now owned by CBS is they will continue to carry rival news network streams - I note they also have content from NBC news and other news networks that are competitors to CBS. Could be old contracts still in effect from prior to CBS purchasing it from the independent start up that Pluto used to be.