2013-05-26, 23:10 CET: The link is not hidden, it is clearly visible and with correct description. Currently this works also on a sunday.
2013-05-27, 19:30 CET: Login / registration works on Chrome / OS X .No forced logout.
2013-05-28: link activation worked fine without problem
and so on. I don't want to say that the OP is wrong, it might be the OP has experienced exactly what he has. But generalizing this is total bs. I have done many bureaucratic steps here in Germany and most of them were really fine (submitting tax forms, applying for tax ID, business registration (Gewerbeanmeldung, Handelsregister), banking account, healthcare insurance, ...).
There are many different places where to submit forms, but usually the local trade organizations (Handelskammern) help you by organizing / bundling things together. Been there, done that.