When a software accepts a full-time position, they are taking a mammoth pay cut from what they could make 1099 contracting. They do that because the full-time position comes with a commitment to continued employment, so even though they could be making 2x-3x more per day consulting, they don't have to hustle to keep their utilization up.
The "3 month probation" thing is essentially a temp-to-perm contacting position. Do you pay people 2x-3x more during that period?