I assumed they were referring to how MVM had initially licensed Aria season 1 and waited to see how it would sell before licensing the other seasons.Which people then can buy if they liked the DOTW, is what was meant I think.
I have the Sentai releases already, except non-stop, but it's a really nice slice of life series.
As for Non Non Biyori I have trouble recommending it. The slice of life aspect is great for sure but it gets very creepy around the 10 year old Hotaru. I dropped it halfway through season 1.