Email verification services are very expensive and you have to pay for each mail address you want to verify.

I used many solutions like Bouncer or Mailboxlayer. But here you have to pay at least 50 dollar for 50k verification ....

With this deal the credits comes back into your account year after year and makes this deal a clear no brainer and truly a lifetime deal. So for $59 you get 1.000.000 credits for the basic deal and this just restarts after a year. $59 is just for 1.000.000 credits cheap and here you get it for free year after year.