Voiceover artists - client wants to purchase my gig to use my voice sample to create AI. Bad idea?

[actressellen]

I have a client who is offering $500 to use my voice sample to generate 5,000 words of AI for their video game. They have a contract they are also asking me to sign stating the words will only be used in their game, but I keep feeling there is a red flag here. Have any other voiceover artists had an offer like this? My concern is that even though the contract says it will only be used for their game, I am giving up my voice for them to do whatever they want with. Anything I'm not thinking of? Is this a potential scam?

-Ellen