The difference between a "Paid Job" and a free job is that a paid job uses points that were purchased during its creation. A job that is created using "Promotional" points is not classified as a "Paid Job".
The publicly shared version of a "paid job" will not contain any reference to Maps Made Easy. For individuals or companies that wish not disclose how your data was processed it is important to purchase points and use them for processing.
Paid jobs are eligible for custom branding placement.
There is no difference in how the maps are processed. The only difference really is that if the job was processed for free, the "Maps Made Easy" part of the map data attribution will included. Even if you change the attribution text to your company name and website the Maps Made Easy attribution will still be shown on free jobs.
The other advantage of using "Purchased Points" is that the web map will never expire or be deleted from hosting on our system. Free jobs that are not used for 6 months are eligible for deletion.