If they had invited you to a forum and you spent a few days testing your theory which would benefit them by helping secure their network , they would owe you something for your efforts.
And I would call them welchers too.
With the evidence we have so far, CfB's 30GH/s attack on bitcoin is just as possible as cynicSOB's is on Nxt.
Do you see the problem?
I like what cynicSOB is doing and hope he finds something, and I'm glad to donate some Nxt if he found a flaw,
but you shouldn't trust just words from strangers on the internet.
Don't trust just words , but what he did to apex was proof it can be done.
And if you follow the numbers he did it with 20% of apex stake weight.
Nxt could have said let's pick a 3rd party both trust to hold the bounty and received the info ,
if it turned out to be true, cynicSOB is paid by 3rd party and 3rd party relays the info to NXT,
if it turned out false 3rd party returns the bounty to NXT and deletes the info cynicSOB sent them without giving it to NXT.
The 3rd party would make the decision if it was true or not, just pick someone both sides agree too.