Newsletter Letter Sign Up Methods

What ezine sign up methods are everyone using ? What I mean is, are you using exit or entry pop-ups, sign up boxes on your site, sign ups via text links, or the automatic sign up that pops-up and all you do is hit okay ? Or a combination of all ? Finally, does anyone purchase ezine subscribers via worldwide lists or another company (eg. 15 to 26 cents a subscriber) By the way, for the automatic pop-up where you just hit okay, does anyone know where this html or software can be purchased ?

Are there any other fast methods of getting subscribers ?

Thank you in advance. Have a nice weekend !