Malwarebytes Anti-Malware Lifetime Software $9.99, Malwarebytes Anti-Malware 2013 Lifetime Software $10.99 + S&H

Quote from yudaman : Just curious. Other than being illegal, is there a difference between this copy and a pirated copy? I mean if a AV can be pirated for lifetime, does it mean it's not reliable to begin with?

No difference, except legality.

Anyways, as of 3 months ago I know that a Pro key can be used multiple times without issue, on multiple computers (and obviously for a lifetime). It doesn't even require internet for activation.. I'd recommend just buying it and using the key for all your family members computers and offer to install it for friends for $2..

Source: Ive installed malwarebytes over 1000 times from my previous job; the only time it cares about your activation key is the first time, they wont blacklist a key unless you go crazy with activations.