j"1LAnZuoQdcKCkpDBKQMCgziGMoPC4VQUckMU<div class="post">Many big ISPs give you a new IP every time you connect, usually in the same class B (a.b.?.?). Maybe you should have a minimum time between payments per class-B.<br/><br/>If you can't solve the problem, you can always keep lowering the amount of bitcoins given until it's manageable, and always require captcha.</div> text/html
https://whatsonchain.com/tx/415401ffc8d7586aecc0cd8aec9d47e363bb3feef6841be7bb2423bb054b1cd4