Why can’t I just do “more” outreach? What am I missing?

Me and my cofounder self-funded a sales outsourcing agency focused on the industrial and manufacturing sector at the end of last year. We split everything 50/50 and bootstrapped it ourselves. We’re just starting to make real money now and things are finally beginning to feel like they’re working.

Cold email has been very good for us so far. I think a big reason is the nature of what we sell. Our service isn’t something owners think about all the time. It only really matters when a specific problem or constraint shows up. Because of that, cold calling hasn’t worked very well since it requires immediate need, and LinkedIn hasn’t worked great either because owners don’t really engage there.

Cold email has been different. It’s asynchronous, easy to personalize, and doesn’t force urgency. Owners can reply when the timing is right, which seems to matter a lot in this industry. We’ve tested a lot of different cold emails, we both come from sales so we know what it takes to fulfill, and we’re getting good results for our current customers.

My genuine question is this. Why don’t people just do more outreach once they find something that works?

For a few thousand dollars a month, why wouldn’t I just reach every single person who could realistically use our service? The market isn’t infinite, but it’s large enough that this feels doable.

The only reason I’m second guessing this is because I don’t really hear about people doing it this way, which makes me feel like I’m missing something obvious. People usually bring up deliverability, but that hasn’t been an issue for us. We send under 30 emails per inbox per day, warm domains properly, and our domains have been in good health for a long time with no problems so far.

So what am I missing?