Their straightforwardness is nice, but I wonder how sustainable the business model is - every paid account has some message send/receive limits but there is no cap on storage. [1] They also say they've been profitable (on the same page), but I'm a bit wary of anything that says "unlimited". Nevertheless, thanks for pointing to this one. It looks very attractive for those who need to use multiple addresses/aliases/domains.
[1]: https://www.migadu.com/en/benefits.html#anchor_storage