I did some research on BetOnline this morning for PokerTracker, I am sharing my basic research with you all, I hope it helps. I have not downloaded the BetOnline client, everything I am reporting is based on research alone.
BetOnline says they are on the Hero Network when I spoke with their customer support, and I was able to confirm this is true from my resources in Costa Rica which work for a different company. The Hero Network does not list BetOnline as a skin and is not yet tracked by PokerScout (I spoke with him about that, hopefully he can do the research necessary) - I dont find that too odd, it is sometimes common in this industry to only list skins that are white labeled in this industry - if BetOnline is using its own processor or requested to not be listed as a client then that would explain this oversight.
Action Poker Network is the same thing as Tiger Gaming (where I used to play Asian games years ago with successful payouts but that was many years ago), it is owned by Play Safe Holdings - an active participant in the affiliate conferences I frequently attend. I have no personal experience with Play Safe's business other than hello-goodbye at conferences. The Action Poker Network does not use it's own software, they license the "Las Vegas From Home" software for their network. This is similar to what ENET and Yatahay, do with their software (same software, separate network) and what the Everleaf model used to be as well.
The Las Vegas From Home poker client can be found here:
http://lvfh.com/eng/online-poker-software.php
The Hero Poker Network client can be found here:
http://heropokernetwork.com/features
From appearances in these images alone, I think it is safe to assume that Hero Poker Network does not use Las Vegas at Home's software solutions. Not only do the skins look radically different, the options offered on the two images don't match - hence unless there is further evidence I think we can debunk the assumption that the Hero Poker Network is associated with Action Poker Network.
One final bit of evidence - assuming the image on this affiliate page is correct, it appears that BetOnline does in fact use the Hero Poker Network -
http://pokernewsboy.com/betonline-poker
I know nothing about BetOnline as a business, but there is one thing for sure - the sportsbetting industry in Costa Rica is known for pay their customers. It takes a long time to complete the processing, but that is a known downside to doing sportsbetting using a Costa Rica based book (caveat - I don't bet sports, this is only from third party knowledge - feel free to chime in if your experience is otherwise). I cannot say if that is a good thing or a bad thing, I feel processing is the greatest risk in the online poker chain and it is up to each individual player to make that decision on their own.
I hope this helps to clear up any confusion about BetOnline's network, and if it does not then helps to point people in the right direction for further research. I had to do this investigation because players were requesting that PokerTracker add support for BetOnline, its not something that we intend to do at this time but we will continue watching for the future.