I wouldn't be surprised to find out that many people who know about you and the SIAI are oblivious of your fiction. At least I myself only found out about it some time after learning about you and SIAI.
It is generally awesome stuff and would be enough in itself to donate to SIAI. Spreading such fiction stories might actually attract more people to dig deeper and find out about SIAI than to be be thrown in at the deep end.
Edit: I myself came to know about SIAI due to SF, especially Orion's Arm.
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