they will actually enforce what they’ve been saying they’ll do: which is delete everything older than 90 days old. Previously, on the free tier you couldn’t access stuff older than 90 days but if you paid, you would gain access. Policy will be to delete and so it's gone even if you upgrade.
Yeah the per-person billing was a killer for us. Glad to hear Mattermost is OK. I'm just getting going with it.