The life of a pointspread.
Back when Bob Martin was king it was real simple, but even Bob Martin as sharp as he was would read his openers to a few real sharp players and let them bet into it so that he could identify any weakenesses in the line such as if one side of a particular game got all the action from the half a dozen or less sharps that got a look at Bob's real Outlaw line. That would call for an adjustment, if the sharps all laid -1.5 for example Bob would release -2.5 in respect of their expertise. Now anyone who wanted that side the Bob Martin sharps bought at -1.5 had to pay -2.5.
Once the line was shapened up by the very best it was then released to books on the strip like the Stardust where it would get further sharpening by lottery before the other more cautious strip joints and locals all over the US released the games to their clientele.
Later on The Outlaw line became a PR move at Ballys where they would hang numbers a day early only accepting low limits like dimes on sides in the NBA. Then on game day they would go to whatever their regular limits were on a particular sport. That is not what the real Outlaw line created back in the 60s by Bob Martin. You had to be one sharp player to bet into Bob Martin's outlaw line.
By the time Joe Public saw a number it had been first created by Bob Martin and his ultra sharp power ratings, then further sharpened by guys like Lem Banker and other sharp sportsbettors who were allowed to bet into Bob's unreleased yet openers before it was then further sharpened in lotteries at books like the Stardust. Finally when the numbers had been flattened out at the Stardust and I hate to say it Hilton lotteries your run of the mill joints along with locals everywhere would hang them for their players..
The big books operating offshore in pre internet days but after after Bob retired and unfortunately passed did the same things with their openers, usually called in from a pay phone in front of the Stardust by a runner, the big offshores then let a few, sometime with some books just one single sharp get first crack at the line after which the offshore linemanager adjusted off his play before he read the numbers to the already in their seat clerks waiting to answer ringing off the hook phones at a certain time everyday. Within an hour just about everything was flattened out, then it became a waiting game to see who laid or took what during the day and trying to get that number at some sleepy out somewhere or taking the worst of it by a half point or even a full point if the "originator" was very well respected.
Naturally unforseen events like late released injuries, suspensions and unusual weather could effect a number to, which would create a flurry of phone calls also. The name of the game for the better players was getting on the right side at the best available number.
wil.