"this were tradable assets, so the payments are not relevant to the value of the asset but instead are a benefit of holding them." makes no legal sense whatsoever.
"Also please point me to the place where it's been stated since the beginning that these contracts are malleable." would have been up on bitfunder the entire time the "asset" was listed.
It made no sense that we could buy and sell these contracts and that value is separate from the dividends you paid? I buy a contract for .15 btc . . . receive payments for the duration then sell it to someone else for .15 (or whatever valuation is). claiming that the dividends were paying off the value of the contract is not even remotely close to how this works. There is no termination point of the contract and you have a lot of outstanding "bonds" that still haven't met fruition.
Everything you sold since bitfunder's demise is not under those terms, but under the ones on these forums. It could be argued that these forums are the actual publicly identified terms, since they are were you perform your business and that sneaking things in other places is a deceptive practice.