LOL you are wrong, it is confirmed by the admin that all post must be counted by the bot even it is from excluded boards but before the bot will send the payment, it will be checked again and removed the posts in excluded boards and posts with less than 75 characters

Hello campaigners of Bitmixer, I want to ask if I'm eligible to join in this signature campaign even I have a negative trust?

based on the OP, negative trust users isnt allowed to join, however i've seen in the past that there are some users wearing the bitmixer signature and im not sure if they are getting paid for that. anyway, you can try joining it and check the bot if it will accept you

some say there is no slot available when they try to register in the bot, maybe you can try and check it for yourself maybe you can get some lucky timing as someone might leave just before you join

my 2 post not counted
what happen about your bot friend ?

You do indeed seem to have more than 10 qualified for payment posts made within the 7 day period. I just think you are a bit unlucky as the bot suffers from time outs occasionally. In these time out periods the bot doesn't count anything. For example you make 40 posts and the bot only counts 30 of them. Did the bitmixer page show you indeed that you had made around 30 posts?

how about my 2 post ? why bot not count it ?
https://bt.irlbtc.com/view/1267977.msg13089071#msg13089071
https://bt.irlbtc.com/view/886197.msg13055139#msg13055139

I have the same thing. From the last payment date < 23/11/2015 to 30/11/2015 > I posted 25+ posts and I got paid $1.06 US.   All posts was within the rules stipulated by this campaign. Where did things go wrong? None of the rules has changed, so it must be something wrong with the bot.

Can you please look into this?

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I figured it out, there are nothing wrong with the bot. A legendary member of the forum deleted whole self moderated threads, when he/she did not get paid for his/her signature campaign and took all of our posts with him/her. This influenced my final statistics read by the bot.

Sorry for the panic, but I thought I was doing something wrong.  

when the place opens
I want to join

Yes, Just keep use that signature in your account, Just not you want to join in this campaign maybe you are on the waiting list of this campaign