We definitely did, there was an immediate, directly correlated increase in user signups while we ran ads, and an immediate corresponding drop when we stopped th

We definitely did, there was an immediate, directly correlated increase in user signups while we ran ads, and an immediate corresponding drop when we stopped them. Looking over ~12 months of analytics and usage data in hindsight, Google Search ads were the primary drive in signups. The users we got through ads were generally surprisingly high quality too, they stuck around and continued to play games for many months, even years after signing up, in an industry with relatively high churn (free online games).