Moreover as I know that it is no open to sign up how to get a RiseUP account?
Invite. Last time I checked, they weren't allowing invites because of abuse.
Tbh if you don't know anyone with an account you are almost definitely not the target demographic. If you need just email then there are plenty of more general privacy email providers that aren't specifically for organisers, or you could self-host.
I used to be in a group that use it, and it works very well; we made great use of the mailing list feature, which Proton lacks beyond "contact groups". The only thing is getting an invitation, which I seem to recall reading they're not doing any more.
But here's the challenge: we're falling short of this year's financial target. Even worse, we're unable to support the open-source projects we rely on as much as we used to. While donations have increased since 2020, the number of supporters has stayed the same. To all of you loyal contributors, thank you — you've kept us going! 🙏
However, we need more people to join. Small contributions make a big difference when more people chip in! If you value the services we provide and haven't started supporting yet, now is the time to act. Together, we can sustain a real alternative to big tech services (where you are the product).
Firstly, the proton CEO took the position of supporting Trump by saying that "they are standing up for little people". Saying that reps are good supporters of antitrust laws.
Secondly, the official proton account replied to his post and agreed on the fact that reps are more likely to defeat big corps against monopoly.
They deleted their post later. (The proton official post)
So since then we cannot stand in a corp that is promoting these people.
That's why I asked about riseUP