do these scammers have any way of knowing that user X of their scam site is not someone high ranking on this forum and that's why they steal this person?
there's so much that I still need to understand from these scammers, for me there's something they hide
I don't think they care about the ranking of gamblers in this forum. Instead, they most probably only focus on the amounts invested and randomly select high investment for scamming reasons in my opinion.
They are actively promoting their site through a signature campaign here on this site. This means that they want gamblers from bitcointalk to actively play at their site. Also since they are running the campaign for many months, does this means they are getting the results from this marketing

There's no way 1xbet/bit scammers will be successful in attracting gamblers from this forum (it would be foolish to use a casino with such a bad reputation). I think they merely want to create the false impression they have active gamblers on their platform.
With these facts, i think they do care for the ranking of gamblers on the forum but they are least interested in solving the issues which the forum users facing at 1xbit.
It's evident that 1xbit casino doesn't care much about their reputation in this community, nor do they really care about solving any customer's complaints. In fact, they are the only company to hire known scammers, cheaters, liars and sock puppet accounts to promote their business. I think that says enough about their intentions here.