I’m not sure if it is worth reviving this discussion or not, but for what it’s worth I have been using this service for years and it has been great! I think recommending it in PG is a no-brainer; having an “email aliasing services” section without DDG seems like a major oversight.
I haven’t tried it out yet, but today I discovered the Qwacky browser extension somewhere else in the forum: Qwacky - An open-source client to generate & manage DuckDuckGo email aliases!. It looks pretty neat! It appears to address some of the grievances I have seen mentioned here, for example keeping track of your aliases for you or having support for multiple accounts.