Blocking incoming calls

Good Afternon. Would someone please explain the 10 phone number limit for blocking incoming calls? I have used Vonage [which has no limit] Optimum on line [100 limit] Time Warner [30 limit and it cleared the list every 90 days] Fios only offers me 10 ? Are you aware of the problem with telemarketers? I don't think so. I'd like Fios to be more proactive in allowing me to defend the peace and quiet of my home, by expanding this area. It's quite pitiful compared to other vendors I have used, and it is the Main reason that I am not renewing my contract with Fios when we are done. Thank you.