They all keep trying to take the Bitcoin Nameplate in one way or another:
Let's ask, why is it SO VITAL to take the nameplate? Why not simply build out and provide the software without the brand theft? Because they seek to take control of Bitcoin - It's really that simple.
Don't just take my word for it - do the damn legwork yourself and fact check my claims
(for the record, one exception that I am aware of that borrows from the likeness but not in efforts to actually subvert control - or he's doing a shitty job ;p Bitcoin Knots, a tonal bitcoin client)