How can i make an upgrade? I need to go in "deposit" and transfer the bitcoins to the wallet, or this is kind a donation thing? or i need to have the bitcoins in the balance for pay the upgrade?

English is not my first language, so I apologize for the mistakes. 



After I read all the comments, it seems the big problem is the time to receive the payment. It takes too long. I decided to invest BTC0.0005, 12 hours later my progress is still 0.18% atleast the site really pay the investors (according to other users)