i dont think this rule was so strict at atp and challengers. i was a tournament employee myself and we had live coverage on facebook...
the chased people were the ones who used laptops in the stands (and even then, not tournament press office crew or other accreditation possessing journalists).
last year when I was working at an ATP event, a colleage of mine got into trouble for tweeting from a 250 event and commentating over social networks (he is a journalist and almost got his press pass revoked). he was on a non-televised court and the ATP agents almost kicked him out of the tournament because they claimed he could be helping people make fraud to betting sites... it has come to this. Betting making the rules and dictating the rules.
Another thing that doesnt make sense: if you are journalist at a Grand Slam event, you cannot take photos with your mobile or camera... but you can if you pay for a ticket. It is ridiculous. If you do, they take away your pass and revoke it for life.
Now, in topic: If you want to livescore or tweet about statistic stuff from an ITF event you have to pay for the right. Who do you think are the ones interested of paying to livescore? I can only think of betting sites cos no one in their right mind will invest money for an ITF coverage... simply because only hardcore fans care about low ranked players (and when I mean low ranked, I mean from 300th to 2.000th..)