WORRY NOT! If they reuse your work commercially then it was illegal, simple as. Very very very few open source projects license terms allow repackaging and selling the works. Hopefully enough programmers get together and start suing the pants off these corpos like Artists are doing.
Free software licenses (e.g. GPL) allow repackaging and selling the works, they just also require that any of the ‘repackaging’ is also under a free software license. You can even sell someone a piece of free software without making any changes, nobody is going to buy it though because it can usually be found for free somewhere else.
Under a very strict interpretation, that should mean any LLM trained on GPL code should be GPL as well. To prove that is the case seems tough though, just like artists you would need to make the LLM produce a substantial part of the licensed work to prove said work was part of the training data.
If that would hold up in court is a completely different question though, and then there is also the question of what organization is willing and able to cough up the legal fees to litigate this.
MIT/Expat, Apache??? The only thing that appears to be missing is attribution, really.
