Looks nice. First thing I noticed is that their homepage works without JS. However I am surprised that they didn't remove the account syncing stuff, which could also be achieved with an extension.
This is correct. It could even be part of the application process. I would write them an email that the obvious fake one didn't work and you'll not put your SSN on that site for security concerns. Especially not in the application phase. If they reject you for that you have dodged a bullet.
I gave up, the issue is much bigger than just privacy. Most people have no problem with having their life controlled by external circumstances and being exploited. They say that's how life is. They don't save money, but spend it all. They don't start a company, but just get hired. They don't protect their data, but give it away for free. They don't eat healthy, but prefer to enjoy their sugar and fast food. They don't work out, but just watch TV, consuming ads. Most people are unreasonable beyond help.
My advice is, just do your thing and let the results speak for themselves.
With all these web based office suites popping up, I wonder if anybody needs these? It seems like a solution pushed onto us that nobody asked for. Everybody I know is still using MS Office or Libreoffice and everybody seems to agree that office on mobile devices sucks.