I would spend $500 a month for 2 or 3 months in AdWords using your affiliate links to the sponsor as your sponsor's affiliate agreement allows.

Hold the rest of the money ($1000.00) in reserve for additional SEO work to your existing sites over a similar time period.

You will have time to tweak your plan if you need to this way ...

Bulk traffic will buy you branding but few sales ;)

AdWords and SEO referrals make affiliates money usually (in webcams anyway ...)