Isn't that just the Oracle method?
It works exceptionally well for Slack as we've seen over the years. Someone in your $group uses signs up for the free tier, gets people using it and then you've got to pay through the nose to access any history.
alt Hacker News
It works exceptionally well for Slack as we've seen over the years. Someone in your $group uses signs up for the free tier, gets people using it and then you've got to pay through the nose to access any history.