Imo a higher rate wouldn't be bad, because the current price of Bitcoin is really low. Also, it's the aniversary of 1 year of this campaing, so we could do with a higher rate for celebration

I think they are making a killing in Bitmixer.io and could afford ro raise it a bit, just my 2sats.
Obviously still some people are promoting Bitmixer with the current values. And I think Bitmixer is happy about that, otherwise they would already have raised the rate in order to attract more participants

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Sure, for promotors higher rates are better. But hey, see these campaigns as an extra for participate on this forum and not the other way around; thus don't see participating on this forum as a way of earning some extra bucks.