They only call if someone with your number used them before or another sportsbook you use sold it to them. It's not random. These sports books share customer numbers, I used to work for one years back.
And now Sportsbooks are only allowing $450 a week withdrawal via Western Union and Money-gram. What a joke! I got up 4K and was told I could only take $450 out a week.
Okay, I understand that this is some kind of sports betting thing. My cell number that they call nearly every day is a business line. MY business! Neither do I follow sports and never have I betted EVER in my life!! Why the hell are they calling me?!???