For all the concerns above,
I'm trying to summarize my answers in this post.
1. Op updated with new signed message that reflects the right date - 13th August 2016.
2. I can't sign from these bitcoin addresses 12CL6AnnrQWVDsufXs9YC2KX4KLQssJeha and 1MPyRx9J2GzpqcXwtq4ec3MTozZ7wu3ypi. Both are yobit wallet addresses. 1MPyRx9J2GzpqcXwtq4ec3MTozZ7wu3ypi is the older address. This two address help me to claim small bounties directly to yobit to exchange into usd. This is to avoid bitcoin fees while transfering to yobit.
3. I used 14U42KLuctBUxs9keC1THRDcRmRnT8CgXX since posting https://bitcointalk.org/index.php?topic=1549516.msg15580291#msg15580291 hoping to find a good reward. However, there are no transactions with the address so far.
4. It is not possible to give access to my yobit account. Yobit will not allow you to use multple accounts in signatre campaigns.
5. I have no other collateral to offer at this time.
6. I understand your concerns about the risk you're talking about
a. higher loan - Unfortunately, I have to look for this amount. I can't lower my request.
b. Defaulting loan - I have no purpose of defaulting this loan. However, I can do one thing. I can give access to the account to the lender, if I fail to pay back in 12 days max. time. But the problem is, Full Member accounts are selling at much cheaper price.
I think I have answered all your questions.
I thank you all who took time to post your suggestions.