i don't agree that the rationale excludes the one in return for the other. both things can be true. the investor wanted to buy equity and couldn't do so in the secondary market without driving the equity northwards. and so they approached wave and negotiated the deal.
as the story described it, however, fleecing is the word.
it's almost funny that it was presented as if it was a good thing for investors. in capital destruction terms, it was more than a ten-bagger in a single day.