Let’s think about this, hajario. Your idea is we sell T-shirts through Cafe Press. Looking at your linked article, we find this:
You have to be careful when setting your markup and consider the base price. If CafePress is charging $18 base price for a shirt and you throw another $10 or $15 of your own on there, your item may not sell.
So, we add a $5 profit to an $18 shirt, making the total cost to the buyer $23. We promote this super deal on our site. We’re also trying to get people to spend $30 to subscribe, so we promote that too. A few high rollers may pop for both things, but most people will pick one or the other. So basically we’re siphoning off subscription revenue, of which we get to keep 100%, and diverting it to T-shirts, where we net five bucks. You think this makes business sense?