I'm surprised so many replies here are about removing a free tier 2 years ago. Things cost money, what did you expect? Whenever I get free products that cost money I expect it's either temporary, or I'm being the product myself.
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I do think it was a little bad move because now you can't even test planetscale and the memories of its free stuff still might haunt some people
I didn't enjoy doing it. I felt bad but I don't regret it at all.