Promising investors part of the money received from future crowdsalesIn their own words:
You get the share of Mycelium and the right to receive money whenever Mycelium gets more expensive. Let's suppose that this time, with this crowdsale, it will be valued at 100 million USD. Imagine that when we sell another portion one year later it will be valued at 1 billion USD. So you will get 900 million USD multiplied by your portion (if you are the owner of 5% you will get 5% of 900 million = 45 million). Your initial investment stays with you: you keep owning this right and it is non-dilutable. The next 20% we sell will be dilutable.
Remember that a Cyprus-based holding company is involved, and Mycelium operations are supposedly Latvian-based. This is a borderline pyramid scheme setup and illegal for securities in most of the world.
That sounds like a PONZI SCEHEME.
Paying past investors from future investors money

Why can't these wallet softwares develop a commercial arm for themselves. Like for example offer plugins or show ads inside the wallet.
Adding an simple banner ad inside the wallet, consisting of only an image and a URL, it should be safe. (No HTML or Flash ads obviously for security).
Then every wallet software would have a stable revenue, enough to pay the devs.
Seriously, am I the only person here that can think?