Ok then. I did understand what you meant by cheaper, I just don't work with Dollars but thank you for clarifying that I could in theory save $15 on something. - which having thrown that figure into Google, is only a saving of around £12 or €13 which to be honest, isn't much at all.
Personally, as someone that wants the XL's, but doesn't have them it makes sense to subscribe at this point. Saving $45 when buying 3 of them is worth it. I just hope they'll announce more XL's in the future.