Makes me wonder.
Say 5% of the free tier users converts to a paying customer within 5 years. And user growth is constant. Then over time, you will get a much larger free tier user base, compared to your paying customers (in absolute numbers). At some point, it must become tempting to charge all free tier users a little bit to continue, because the group got so big, so there is a lot that can be earned there.
Is this wrong, or should we expect this?
Cloudflare still operates like this.
And they have become quite infamous for having aggressive sales tactics for anyone going over their internal metrics for the free tier (still under the public metrics for free).