Thread:Extension talk:MassMessage/Default accoount name/reply (9)

The reason 4 tildes use the bot's username is purely technical. We simply post the exact wikitext you enter to the API, which is transformed using the bot's context.

I think un/subscribe links, who was sending it, etc should all be localized on the wiki that is utilizing the tool. I imagine meta will do this since it's now reasonably easy to do so.