The first 100 users most times of a saas products often come from referrals and direct conversations with other users who have been in contact with the products directly. A scalable growth channel is good but there’s the issue of trust on the part of the said user. When you’re still figuring out who needs your products and why they care about it, contacting users directly is a better alternative because sometimes those first users you encounter would teach you allt about your product that months of marketing wouldn’t.