Second, when you are subscribed to something in a certain amount of time you might not really use it as much as you thought you would. You might be too comfortable that the service is just there and easily accessible therefore not really making the most out of it. Like in a gym membership where you pay for the whole month but you only go for a few times.
My question, do they given us an option to use their service for one time/one day instead of subscribe at least for a month? IIRC most companies not offer that, which mean it's different with gym.
If the gym fees $1 per day and $10 per month, you can make a schedule and thinking how many days you will go to gym per month, the most important thing is stick with your plan.
Even at just 10 dollars per subscription, 100 people would make it worthwhile, so it is not that difficult.
It's difficult because it's keep compounding.
Just use your logic, if you can have a nice meal for $2.5, that's mean you gave away 4 nice meals for free.