Most SaaS companies focus too much on acquisition rather than trying to get as much upgrades from those signups.

I am not saying that acquisition is bad, dumb perspective, but from my experience, I know that doubling trial-to-paid conversions drive more revenue and profit than doubling signups. If you still don't agree, I built a tool to let you know how much money you're letting on the table (and eventually how to take back that lost revenue)