He was a bad writer on purpose. Josh Zeidner is a great writer on the other hand.
I don't see a similarity in writing style, and americanpegasus' posts look reasonably consistent at least back to the account creation here in January 2014 (before Monero).
I suppose it's still possible that it was a Josh Z. alt all along, but I don't see any evidence for it.
Considered unlikely for now.
Unless Josh Zeidner/MoneroMan88 is bipolar I doubt, he hated my guts and Monero on twitter for correcting him about cryptonote.
Do we even know that Josh Zeider was MoneroMan88? Because if the source is nutildah or people like him then I'm going to be skeptical of that too.