Per-user, not really. But on the scale of reaching the global audience, that small privacy improvement really adds up. The privacy-aware have long since been able to disable/delete their ad tracking ID which is essentially all this does anyways, but they were always a very small and negligible impact to the overall profits of these ad-tracking companies.
The signal server thing is true, you can check the Github commit history to verify.
With Techlore, him and Graphene have matrix communities and Graphene has an extremely toxic community that goes into Techlore a lot to cause drama. Not to mention the Graphene creator attacks various people all the time, obviously including Techlore. You can see Techlore’s video for examples.
I’m not sure what you mean by they’re influencing fans. Virtually all communication is influencing others. Techlore has no motivation to bad talk Graphene for no reason, as they have no competition. He’s a YouTuber, and they’re a free android OS.
They dropped SMS support despite it being incredibly important. Disagree with a lot of decisions of the dev, like how they’re anti decentralization, anti distribution to FOSS platforms like fdroid or flathub, and adding crypto crap on top of that.