My elevator pitch for crawlspa.

"Worry about optimizing your site for search engines later. Use crawlspa to automate search engine indexing and focus on what matters, creating beautiful sites that convert visitors into customers."

Crawlspa Tag Line: We index & you convert.

Edit: One more thing, have you considered manually approaching custom web shops? If they are pumping out sites, they probably wouldn't mind passing along the $5 a month to customers in order for them to not worry about indexing the trendy single page sites.