[mariocesar]

Send metrics to AWS Cloudwatch as custom Metrics.

   aws cloudwatch put-metric-data 
      --metric-name registered_users 
      --namespace MySaaS 
      --value 241

Visualize/Filter/Add Alerts using all the builtin tools from Amazon Cloudwatch, you will need no servers and no configurations. Just run in a cron job a set of queries every 5minutes

[mark_mart]

Then get a nice hefty bill. CW is expensive.