Your first 10 customers are won through your own network and direct outreach. You can hand-sell every one. You're not building a marketing machine — you're proving the offer is real.
Your first 100 are different. By customer 30 you can't keep up with hand-selling. You need a repeatable channel that produces 2-5 customers per week without you in every conversation. The transition is where most founders stall.
The trap: trying to skip the first-10 phase by jumping straight to "scalable marketing." It doesn't work. Hand-sell first; systematise once you understand what's working.