I Know it's not a solid proof, but let's be honest do you think is casual?
It is quite easy to understand it(imho), if you look at the post history that I carefully archived you will notice that they post exactly the same format on the same bounty at the same time with the same order on 10+ bounties, in addition to the fact of "randomly" logout all together.
The probability that this happens randomly for 19 people is 0.0000000something%.

I agree for now have no transactions, (he/she/they have started farm bounty 1 month ago) but waiting for the payment of the first bounty and we see