This could serve as a really nice method of securing consulting engagements without the typical formalities of prospecting consulting engagements. I think $99/mo and especially free fall way short of things like "copywriter help" (there are many better ways of phrasing this), and you could essentially sell a retainer-until-you-launch product where you do nothing but help startups launch and setup experiments to net more email opt-ins/presales (all the while charging significantly more.)