It's configurable for paid accounts, and can be set as low as one day. However, one of the best features of slack (and products like slack) is message history and search. Otherwise, IRC isn't all that different (WRT messaging).
How do they know what specific items were purchased? Is there any way for a consumer to see their own data on that? Also, seems like there would be a lot of false positives as I don't consume or use everything I buy with my card.
This has worked for me too. I take a 45 min nap everyday after lunch. It helps split the day up into two parts where I am fully refreshed for both. Some of my friends find it odd that a grown man takes a nap during the day but it works great for me.