This is your third message saying essentially the same thing, but you still didn't address the key factor here: how will VCs recoup their $5.5M investment? Running a profitable privately held business doesn't return enough multiple to the VCs. Therefore the VCs will need to sell their stock eventually, one way or another (IPO, acquisition).
That being said, I'm not too concerned in that particular case, I don't see Ello going anywhere anyway.
And this is the I don't even know how many'th time someone responds with "They don't get enough money" - How many VCs just flat out lose on an investment? Getting a couple times their money back would probably be just fine with them, especially, like you said, Ello is probably gonna flounder.
It's pretty simple though - you take their investment with the understanding that they want an exit, if you plan to run a stable small business that they can't cash out on instead of angling for an exit, it is unethical at best. I'm all for small businesses, but it's a different investment model.
That being said, I'm not too concerned in that particular case, I don't see Ello going anywhere anyway.