yes, They want it bez its related to Ad Pasting Job, Thats why they need e-mail id for their company.. and many people also sell them ... like if anybody gives me $15.00 for 1000 gmail account , then he can also sell it $16.00 or more...
I don't know yet about the software coz you have not mentioned yet, but I can create manually 1000 gmail accounts if someone is willing to give me $15 for that. If you are interested let me know. But I will have same password for all 1000 accounts.