There are basically only two types of users of a GPT program: members and advertisers.
Members are those users who get paid to complete tasks.
Advertisers are those users who pay to advertise on the GPT program.
Of course, and advertiser doesn't need to be a registered user of a GPT website to provide advertising.
With GPTEngine, special membership types can be configured so members can upgrade, for a price, from their
default membership type.
Differentiated options for special membership types include:
Members can upgrade their membership type by using their cash or points balance.