I find that odd.
Three people meet to discuss the venture sponsored by two of them, and for 60 minutes neither of the two makes a single move to see if I am ready to commit to joining them, even in a limited way.
I think that the moral is “Have a contract ready for your ‘client’ to sign, even if it is unwritten”.
Have a sentence that you can bring out after 30 minutes to see if there is any commitment on their part.
If there is not yet a commitment, the 30-minute mark is as good a time as any to find out and take corrective action.