> There's nothing wrong about what I said
You said that @sama's term sheet didn't have a rofr, just participation rights. That is incorrect. It has both.
> that investor can't block a future round.
This is expressly what a right of first refusal, or ROFR, is. To be precise: they can prevent the next purchaser from coming in, though they can only do so by making the purchase themselves. If they cannot afford to, they cannot block. The round will, itself, proceed, but not necessarily with the outside investors.
> to think thy suddenly give investors a right to refuse other investors in future rounds is frankly ridiculous
They 100%, unequivocally, absolutely do. This is the central, core purpose of a ROFR. It happens quite often.
Btw, I checked out your profile. I very much respect your work.