Hi Karen.
The best blind links sponsor I have used is Candid Clicks. The link to it is in my signature.
I have used a number of them but now give all my traffic to them because they pay on nonenglish traffic and they always pay on time. They also have a page for most niches so that helps on getting people to click.
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Candid Clicks - Simply the best blind links sponsor I have ever used. They will even pay into your PayPal account if you want!