Link juice is a colloquial term in the SEO world that refers to the power or equity passed to a site via links from external or internal sources. This power is interpreted as a vote of recommendation toward your site and is one of the most important factors in determining your site's search ranking (and PageRank).
A nofollow link can also directly lead to someone spending money on your company's products or services. If you consistently create awareness and engage with people, those nofollow links may earn you way more than domain authority. Honestly, a nofollow link isn't the end of the world, either for you or for a client. These links are valuable, and important for anyone trying to build their brand online. Instead of focusing on whether or not a link is followed, we should do our best to get those links in front of the right people at the right time, crafting content beyond the link that motivates conversions. As it is for everything in SEO, obtaining links is all about balance: the balance between followed and not followed, "juicy" links and dry ones.