Fiverr is a Freelancing platform that has a simple seeming system for pricing and earning. When it first set out, gigs were set at $5, hence the name. Fiverr kept $1 and passed the rest on to the seller. Of course, with time, more complex jobs have been added and sellers have advanced in levels and can now charge hundreds of dollars for some gigs.
Fiverr uses a system of levels to help buyers to know what sort of seller they are approaching, and also to give the buyers a sense of achievement and something to strive to obtain and hold onto. There are a number of requirements to achieve each level and some rewards for achieving them.