That is how everyone gets the jobs these days. You put a job up for 100 most people will say 50 dollars or lower and the job poster is not going to go for those who said 100. That is just how it is. In general especially with 3d projects people will go with the lower offer simply because they know there will be more edits to be done in future. 3D is not like building a wall. Most of the time the job needs to be done multiple times to get it to be just right.