Wait a second, I ask since 3 months who received the announced 34 BTC donation and your answer is that you donated 0.15 BTC to Tor?
Obviously no: "Choose a charity" is a program run by Stake to help some charities, and it is always 1000 dollars, and you can participate too.
If you are talking about "other-out-of-program" donation, contact Stunna directly.
Stunna did not say who received the announced 34 BTC donation, highly indicating it was put into the own pocket!