My purpose is not to sling mud at you, my purpose is to teach you a bit of how sportsbetting works. Because from reading your posts I can see you don't know much yet. You probably dealt mostly with casino related cases. I am not saying you are a bad person but I'm saying you judgement is clouded by a lack of understanding of the sportsbetting business.
My last lesson then: Yes, Pinnacle may have been just an example. But with any arb there is a soft and a sharp bookie involved. Betby clearly is the soft side, so the sharp side can be several books: Pinnacle, Exchanges or Asians. They all have in common that they have so much confidence in their lines that they do not limit individually and thus are arb-friendly. There is no cheating involved by betting on those books so they will never give up user data. And even if there was cheating involved they would still not share user data with third parties, but that is just a side note.

You can throw away your idea of another book sharing a bet slip with a name to it. Absolutely impossible.
It is very simple: Betby noticed that all or most bets of the user were on value odds, hence they labelled him a value bettor with +EV bets. This is not forbidden according to XYes terms. And to still be able to confiscate the winnings XYes changed the wording from value to arb. And that is nasty.

Edit: accidentally quoted myself, but this obviously is a response to Holydarkness.