I know RemoteOK very well :) I know people don't care whether it is serverless or not. But that's not the point. The point is reducing cost. Why should I pay

I know RemoteOK very well :) I know people don't care whether it is serverless or not. But that's not the point. The point is reducing cost. Why should I pay for services I don't use? Why should I write the same code twice (once for server & once for serverless)? Although a lot of that would be same but I still need to write a lot of config to run serverless. Why should I worry about Scaling?