The number of campaigns you could start was unlimited but recently this was changed.
Free members can start maximum 2 campaigns
Upgraded member can start 5 campaigns each day
What does this mean for you?
It means you have to use your credits more effectively.
In stead of quick campaigns using the minimum of 10 views, save your credits until you
can start the campaign with the maximum views of 50.
Than you will have 50 unique views for your campaign because every member can
collect credits for viewing a campaign one time.