MyGPT can't be shared at present

I am teaching online professionals including CSuite and need to give them access to MyGPTs. At present they need to buy ChatGPT Plus. So sharing the link with them does not work. The model should be that OpenAI bills us for usage and we bill the participants. Having them all buy ChatGPT Plus is not going to work. If MyGPTs are to be a market this needs to be revised.