Nice idea, but I'm getting so sick of seeing just-another-signup-form again and again and again...
Instead of offering the next useless service I would be better off performing myself, someone really should fix sign-ups (i.e. making them obsolete). That would really be progress for a change.
As for authoring, you could also use a decent SCM instead of git for versioning your texts. After all, the workflow model of git is hand-optimized for open-source software development which has nothing to do with book authoring. You would be better off with a centralized repository in typical cases. But git is all the rage now, no matter whether it's actually the right tool. Maybe someone ought to remind the kids that SCM is larger than git, regardless of what fashion dictates.
Instead of offering the next useless service I would be better off performing myself, someone really should fix sign-ups (i.e. making them obsolete). That would really be progress for a change.
As for authoring, you could also use a decent SCM instead of git for versioning your texts. After all, the workflow model of git is hand-optimized for open-source software development which has nothing to do with book authoring. You would be better off with a centralized repository in typical cases. But git is all the rage now, no matter whether it's actually the right tool. Maybe someone ought to remind the kids that SCM is larger than git, regardless of what fashion dictates.