Yes, your coffee is great and wonderful, it's what you look forward to, etc etc. I'll first say that the majority of people don't have such an intimate connection to coffee, so congratulations for being a special little snowflake. I wouldn't say that with such disdain if not for the fact that you clearly think the world of your coffee, yet can't bother to think for the extra two seconds it takes to realize that there is definitively something in your life you buy regularly, that is of no use to you, that you get more because it's simply there.
I don't even drink coffee and I get this analogy they're making. Most of us on this site are making more than enough money to sign up for dozens of these services per year and literally not give a shit. That doesn't mean we should, but the fact that they are that cheap DOES imply that there is little risk other than to your time(and if you don't have time, why are you on that site? Or here, for that matter.).
And before anyone says, "Well if that's the only argument they have for trying their product, it's justified.", I'd first say that I've never seen someone stupid enough to do that before, and I'd second say that's still bullshit, because your problem isn't with the coffee line, it's that they gave you no information as to what the product is. Come on.
This isn't to say you should try every product there is out there, but this is such a throwaway, worthless, immature argument to make that honestly I have to wonder how you didn't think to yourself beforehand, "Didn't the time it take to write this cost me more than my fucking morning latte?"