Why is it nesesarry to give my privat key for the Freecoins from the Bounty campane? They have my Mew Adress. If I get the coins to this Adress and the job is done?
It seems to me that the company wants to control the process of obtaining tokens on the wallet and ensure that all tokens are credited
This does not make any sense. They don't need your eth private key to give you tokens.
They might need proof of ownership but that is not done giving to anonymous team your private keys.