Here's a thought experiment for organized crime, just to elaborate further on what I think may be happening. Keep in mind online poker has been around for a while and so has bot development along with it. This is a rough outline of the steps in the plan:
1. Obtain (by consent or, more likely, borrow without consent) identities of people in various countries that can be used to authenticate bot accounts. Create the necessary virtual financial vehicles needed for deposit and withdrawal purposes.
2. Design bots. Modify as needed to avoid detection. Start with one instance until it is undetectable. Then create communication algorithms and poker collusion strategies for multiple running instances of this bot, so they can cooperate as a team.
3. Use identities from step 1 to create accounts for multiple bots on a target online poker site. Create log-in and running schedules for bots so they are not all operating at once, along with counter-surveillance schedules to further help avoid detection.
4. Run attacks on a variety of poker tables. The more of your bots that can be at the same table, the greater the edge for that team of bots.
5. Withdraw funds in small amounts to existing financial vehicles for the bots, then transfer to a centralized account once clear of the online poker site.
This kind of approach is what I am talking about and would explain a lot of weird calls and weird variance that comes along with them online.