Well, I can't help but be curious, what was the acquisition price?
I guess it's like telling people your salary -- just a thing people generally don't do. I think that'll change one day tho as stuff becomes more public.
Can you at least say how many 0's?
Was the acquisition to get your user base, or to get you to come work for them to build out their newsletter service?
But basically, they like TinyLetter. TinyLetter likes MailChimp (srsly, the email business can be slimy as hell but they're totally legit, upstanding, & everyone knows it). TinyLetter has a good brand and a decent amount of users (roughly 500,000 people subscribed to 30,000 newsletters). Both companies recognize an opportunity that we think is large, and buying TinyLetter gives them a head start.
I'll be helping advise TinyLetter for a while, and we both really wanted to work together.
So basically, for these reasons and more, it just "made sense," if that makes sense.