1) Is it safe to always use the same wallet to send to BestMixer prior to mixing? In other words, is there any privacy concerns if I always use the same "pre-mixed" BTC wallet address to send in my BTC to BestMixer?
2) I did my very first mix the other day and I selected the Gamma Pool. I was supplied with a Best Mixer Code but I don't think I technically need it if I'm only mixing in the Gamma Pool. Is that correct?
1. I don't think it will be a concern if you mix a coin from the same previous address over and over again. But I don't know for sure yet, Maybe OP or someone who have the more technical ability able to explain it better.
After all, Re-using address is indeed reducing security and privacy, Nevertheless, I don't know if it still applies if it used to go through a mixing process.
2.
What do 'Alpha Pool', 'Beta Pool' and 'Gamma Pool' signs mean in the settings of the Service Fee? And what is the difference between them
Another important difference is that it is necessary to apply BestMixer code not to receive your coins back in the subsequent mixing when using the reserves of 'Alpha Pool' or 'Beta Pool'. If you use 'Alpha Pool' or 'Beta Pool' reserves, BestMixer code also guarantees a cumulative discount, depending on the volume of mixed coins. When using the reserves of 'Gamma Pool' in the subsequent mixing, it is not necessary to use the BestMixer code as it is impossible to get your coins back. The use of BestMixer code, when using the reserves of the 'Gamma Pool' in the subsequent mixing, does not give any discount, but fixes the total amount of mixed coins, and it can be used to get discount when using the reserves of the 'Alpha Pool' or 'Beta Pool' in the subsequent mixing.
Correct. Since a mixed coin from Gamma Pool option is received from a clear origin, So, you do not need to use the code to prevent receiving your coins back. Nevertheless, the code could give you a cumulative discount over Alpha Pool and Beta Pool option.