affiliate approach built-in buyer buyers buying calculate cart checkout comment commissions consider control custom don during e-junkie-generated emails explains form gather general generated help html input order over page paypal product products purchase putting result sales simplest site sites spread system thank-you-page thank-you-pages third-party track wish word

Hi, I wish to reward those who spread the word about my products.
For this I simply ask buyers who told them about the product they are buying.

Can I gather buyer input during purchase ? if not, where's the best place to do so, the thank you page or one of the emails ?

You may wish to consider using our built-in affiliate system to track referrals to your site and calculate commissions for sales generated as a result of those referrals:
http://www.e-junkie.com/ej/help.affiliates.htm

Otherwise, we don't really have a way for buyers to enter a general comment about their order in the cart before checkout, and we don't have much control over the third-party checkout sites we use (e.g. PayPal), so putting a comment form in your thank-you page may be the simplest approach. This help page explains how to add custom HTML to your E-junkie-generated thank-you pages:
http://www.e-junkie.com/ej/help.custom.thankyou-page.htm