I've changed my mind about Mixtum after a conversation I've had with my campaign manager, and after a thorough research of mine. It's very likely that they're having strict terms to avoid sanctioning as they are considered money transmitting service.
So you are confirming that MixTum does not respect your right to privacy and thinks they are ethically superior since they scrutinize your data and then use that information against you:
Would you use a privacy-preserving software whose developers don't respect your right to privacy? Not only I would not, but I would even feel offended, and would recommend to avoid
Or just not use their software altogether as an indication of disrespect for their dishonesty towards me, and for being so arrogant to think they are ethically superior.