Paid growth involves spending money to acquire users. It's important to ensure that the lifetime value of a customer exceeds the cost of acquiring them, or else the growth strategy may not be sustainable.

For paid growth, ensure you have revenue before investing in ads, and understand your customer acquisition cost (CAC) versus the lifetime value (LTV) of your users to ensure profitability.

When measuring customer acquisition cost (CAC), focus on active, monetized users rather than just sign-ups, as many may drop off shortly after registration. This ensures you're tracking the cost of retaining valuable users.

Relying solely on paid acquisition for growth is risky. If your growth depends only on ads, it may not be sustainable in the long run, especially as competition increases.

The customer acquisition cost (CAC) must be lower than the revenue generated from a user to ensure sustainable growth.

Increasing ad spend to meet growth targets can backfire, as it often leads to longer payback periods for customer acquisition, making it harder to sustain growth.

If your product is valuable and users have a high lifetime value, then investing in paid acquisition channels like Google and Facebook can be beneficial.

Be cautious with paid growth, as it can be risky; if you pay for users who don't generate enough revenue, you could run out of money.

As a founder, you must track whether free users convert to paid users and over what timeframe to ensure your business model is viable.