A little math:

Someone who pays for a job is most probably someone who is representing a company.
This company can either:
-employ someone to do the job inhouse
-hire freelancers to do the job
-purchasee readymade stuff from other companies (works not always)


If an inhouse worker is working on a 2200€ monthly basis, and can produce 2 quality levels, the company has to pay
(roughly) 1100€ per level.


So the company knows that it has to employ someone full time,
to make a level for 1100€, or purchase it from a freelancer,
for 1100€.

ALTHOUGH: the freelance has the disadvantage to work from the distance. Small changes take a longer time to get implemented,
since the communication is not as good, as working in the office.
Also for balancing the level later during development,
the freelancer must agree to do additional touchups later.