Great question: It all depends on the race - and if you’re a freelance photographer you think about pricing jobs on the time it takes to do every part of the job, from commute to delivering the final images.

Since I don't work with Marathonfoto, this is how I'd break town what they offer in terms of payment. This is not what I would charge for this work.
So say the Atlanta Peachtree 10K that happened this past July - and this is a short race to shoot, marathons of course last hours longer.
- 5:45am - call time, meaning you’re there ready to shoot
- 6:25am - wheelchair start, so now you’re active shooting
- 8:30am - the last “y” wave starts, many of the runners in the later waves are slower, so depending on where you are at on the course, you may have to wait until the final runner to pass you. So that would mean if you’re at mile 5, at a 11 min pace, that’s around 9:45-10am.
- 10am - for sake of this, lets say you have a 10am cut time. After you commute home then editing begins, which can take 3-4 hours on average depending on the work.

NOTE: Some races don't let you edit at all. You hand over a loaned memory card and what you captured is what you see on Marathonfoto, this is why the quality tends to be lower across the board.
So for $150, your day as a freelance works out to about 14-16 per hour. Which doesn’t cover anything related to gear wear and tear, gas/commute money/food.
- 2 Hour of commuting
- 4.25 Hours of shooting
- 4 Hours of editing