I'm not involved with the "CTResearch" group, but I am not so sure that trading among collectors is a bad thing. Profiting is something else, but tape-trading among fans and scholars I can't frown upon. Especially artists like Cecil, whose music demands careful study but who hasn't always had the benefit of record companies willing to release his music.
Not having been around the music in 1966, it's great to hear such an important transitional piece as "Amplitude" on "bootlegs," not to mention write about it.