In addition, I would say just the opposite - the less legitimate site is the more suitable for the mix it is, I mean that there are low chances that site will share logs or has logs at all. i.e the less the site is legitimate, the more it will be similar to the site of the first group.
True, but using less legitimate site increases risk of lossing all you have deposited there because even if they run away or doesn't allow you to withdraw there will be no place to complain about them.
mobnepal,
If you tremble at the thought of something ilegal then you definitely should avoid using bitcoin mixer sites. All this sites have nothing with legitimacy and reliability which you are talking about. Those who use such services should divide amounts into small parts, and exchange one by one.
Btw, If the site, which you are advertising, will disappear with some amount of bitcoin, the only one who can be found and captured from this organized criminal group - will be you, i guess. But your revenues from this adv, which will be collected from you in such case, unlikely to cover the losses
