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Not only that, but actual cards written by humans will be mislabeled as cheap robot spam.

I really wonder what font they are using. The big challenge is not finding a handwritten style font but finding a font with multiple different variants of each letter.

It becomes painfully obvious if you have two of the same letter in a row that are exactly the same. I’ve only found a couple of fonts that have that variability within a single letter and it’s pretty stunning how big of a difference it makes

There’s the famous "random" font Beowulf [0], and also a list of such fonts [1].

[0] https://letterror.com/fonts/beowolf.html

[1] http://luc.devroye.org/randomizedfonts.html

I do wonder if every marketing study actually has the conclusion "almost anything you do will increase sales as long as it's something the customer hasn't seen before". The Novelty Effect is real.