Bloctel ineffectiveness (the previous opt-out system) was cited as one of the reasons for moving to a ban. I was on this system too and used to get scam calls

Bloctel ineffectiveness (the previous opt-out system) was cited as one of the reasons for moving to a ban. I was on this system too and used to get scam calls too (they would come in waves, like 3-4 calls in a week, nothing for a month, then another 3-4 calls). I stopped receiving calls from reputable companies (that probably abode by Bloctel's list) when I signed up though.