I have had the same thought about their back catalog. Maybe they were even the ones behind the old tunes tapes.
That said, if Hooper Bay is real, I wanna hear it.
Honestly, I think some disgruntled person/people were behind the leaks of their unreleased music. The only reason they'd leak the Old Tunes and R35TT is just so it couldn't be held over the fanbase's heads. I mean, I understand it's their music and they don't owe the fanbase anything but sometimes I do think that alerting people of a bunch of stuff they'll never hear in their lifetimes isn't exactly the nicest move. Contrary to what the Cosmic Crofter said, M & M couldn't be so naïve to think that adding those secret albums to their discography wouldn't create demand to hear them, especially when you consider the quality of what they have released.
The person who leaked the stuff we have was pulling a Robin Hood methinks.
And yeah, props to them for making Hooper Bay and Play By Numbers sound like lost masterpieces. In a way, I sort of hope they made this stuff up. Then I'd consider them master trolls who pulled a pretty damn good prank on the fanbase.