Simple Goods: selling embedded in any website (opens in new tab)

Do users trust credit-card forms like these that don't have obvious payment-processor branding? I seem to remember HN discussion of something like this, but didn't find any by searching.

You've included bootstrap-responsive, which is making the site look silly on anything less than maximised (1280x display), fyi.

Seems similar to Ribbon.co- in pricing, too.