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Background : There are several electronic and email based online transaction system worldwide. For example, Paypal, MoneyBooker, Alert Pay and others.

My Question : Why most of the Websites supports only Paypal for online transaction?

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closed as off topic by Polynomial, Terry Chia, Lucas Kauffman, AviD Nov 23 '12 at 7:57

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Because PayPal is by far the most popular. – Matrix Nov 22 '12 at 10:52
Because PayPal is well-known, accepts most credit cards world wide, has low fees, has good fraud protection, rarely gets breached, and is trusted by consumers. – Polynomial Nov 22 '12 at 11:00
@Polynomial, +1 to your comment. :) As usual, your comments and answers helped me. Thanks for your comment. – Md. Mahbubur R. Aaman Nov 22 '12 at 11:04
This is not really a security question, is it... – AviD Nov 23 '12 at 7:57
up vote 3 down vote accepted

This isn't a security question, however a quick answer:

  1. It's cheaper than using a credit card broker. Paypal's fees are low, meaning more take-home for websites
  2. The API is easy to use and well supported.
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