Press 1 Leads: what Companies Are Good for these Leads?

[RookieYankee]

I keep hearing from people that press 1 leads are very cheap and have a good pull. What are some good companies I should check out?

 

[dondulah]

I'm afraid these are illegal b2c

 

[HoosierLife]

Thad used to do these legally. I don't know if he does this anymore?