One other thing especially for newbies:
Sometimes you don't have to give a sports service your number, as they can it on their own.
How you ask?
Well this can and will occur if you simply call their comp. line and the service uses its caller id to get your name and phone number.
Once again I speak from experience as it has happened to me on several occasions.
The best and most memorable example I can think of occurred I am going to say around 8-10 years ago, when I decided out of curiosity one day to call Stu Feiner's comp. line to see if the lying piece of work talks/promotes himself in the same way he did/does when he used to be on those Saturday morning shows and with his videos, writeups and insane pricing on his website.
Well not surprisingly I found out that there was essentially no difference-you know the made-up records, the self-glorification which goes with it, etc.
Well to cut to the chase, the very next day, having obviously got my name and phone number from the phone id, lo and behold I got a phone call from Stu himself!
He was actually out of character, very low key, politely and respectful.
He told me that he had noticed that I had called his comp. line and told me that he had several packages which were not very expensive and asked whether I would be interested.
While I was listening to him, I was thinking to myself that if this guy knew how many times I had rightfully exposed him over the years with my commentary, "perhaps" he would not have called me and/or had been as nice to me as was.
Anyways, I told Stu politely that I was a very small player and gambled for fun and entertainment only(which was true back then and today), and that no matter how little he charged, it would not make sense to me to buy his service.
Stu was very polite and to quote said, "I understand" and the conversation ended.