Yes many customers have moved from Skype without issue :)
Yes if you want to switch to one of the other routes please follow up with support and they can move you in the next batch
Also per the other post, note we've never claimed "all providers do this" when it comes to the profanity filters. All providers have some filters and those filters have all got tighter over the past year, but only one provider we're aware of (which happens to be our default, but because of this no longer only, provider) is censoring profanity.
https://pinata.cloud/pricing free for 1GB
Haven't tried this one but https://filebase.com/pricing/ says free for 5GB
Any client that can do voice calls will work with JMP.chat. As a user generally it's not useful to think about XMPP or protocol extensions, this is an implementation detail if you're building a library or SDK. We consider Cheogram Android to be a first-party app and all Snikket branded apps to be pretty close, everything else is a third-party app with the uncertainty that entails, but basic functions like text messages and calls are standard enough to pretty much always work.
If you happen know someone working at the right department of a major RCS provider or user (Google, AT&T, etc) then let me know.