Number of sites
Each version of the software will give you the ability to automatically promote your website. Depending on the number of sites you have to submit may help you determine which version is best for you.

Standard Version: Will submit as many sites as you want, but only 1 at a time

Pro Version: Will submit as many sites as you want, and you can do up to 10 sites per each submission. So, if you have 10 different sites or 10 pages off of one domain, you can submit 1 - 10 of them at the same time. But, you can not automate the submissions with the scheduler.

Platinum Version: Gives you complete control over your submissions. Set you program on autopilot with the Scheduler. The Platinum will submit as many sites as you want, and you can do an unlimited number of sites per each submission. So, if you have 10 different sites or 10 pages off of one domain, you can submit 1 or all of them at the same time. You can then use the Scheduler to resubmit these sites every day, week, month or yearly. NEVER worry about submitting your site again!