Mate... That had not even crossed my mind :O! I don't have a lot of sales experience, but I used to work at a digital agency, and that thing was just crawling with sales people, I'll phone one up and ask them about it, and mention your comment, cheers!
If you have time available, consider taking an entry level inside-sales job for a few weeks or months.
They're typically OK with short term, because anyone can do the job. It just takes being able to tolerate making 100-200 phone calls per day.
A little sales experience is helpful, especially when it comes to how to present a product and how to create a strategy to overcome objections to why a person doesn't want to buy.
It will also help you get used to confidently presenting ideas to strangers--despite & becoming immune to-- the risk of rejection.
Coupons, booklets, degrees, certificates, and networking are not sales.
(Neither are designing a logo renting an office and printing business cards, in case anyone wonders).
No amount of competency can compensate for a lack of sales. No amount of credentials, either.
Sales come first. Before everything else.
If you aren’t selling your business is dead.
Good luck.