Person who share the bet slip , doesn't wish to share name of bookie . Cause if he will tell this next bets he will get harder to stake ( lower limits , faster odds fall down and etc. )
I don't think that's going to happen if you are gambling in a legitimate sportsbook. OP is simply asking about which bookie to choose, probably because they just saw a bet slip for an event they are interested in. Let's not speculate too much. However, I would advise OP to ask the poster of the bet slip directly; it would be easier for us here.
