If quality was your only concern, you'd just charge a one time $5 fee. So I'd say greed is at least somewhat involved.
And yes giving away coupon codes is good and well...but then you run into the quality problem that you use as an excuse to charge from the start.
Don't get me wrong, there is nothing wrong with greed...provided it doesn't cause you to kill your business before it gets the chance to get off the ground.
Business exist to earn money and the best way to convince others of the value of your service is to charge for it. You can argue that it isn't good business sense, but calling it greed is a judgmental call that you have no evidence of.
I always remember being impressed with the way Heroku did things in the early days. After beta feedback it must have become clear to them that it made sense for them to rewrite from the ground up. This left them with a beta platform which they gracefully continued to support, renamed herokugarden, whilst also rolling out the paid for service. They then provided plenty of info on how herokugarden users could migrate to the new Heroku platform for free too. I'm sure they learnt a lot early on about what direction they needed to take the Heroku platform. Anyone remember the web based code editor? Without the early feedback from beta users perhaps they would have pushed more in that direction instead of changing course towards the Heroku we all know and love today.
It's not greedy, it's just not a good idea to try and capitalize on a service that isn't running on all cylinders yet. Having said that, definitely a chicken and egg problem. I would worry about getting users before starting to charge for the service. Once a larger number of members has been obtained thinkings of ways to monetize it should be fairly straightforward.
The typical employer expects to pay to post a job listing. Yes more traffic is better, but I bet this site will start getting major traffic within a month. Being a specific niche I also predict it will get some major google SEO juice before to long. So that egg better start running or the chicken will catch up!
I don't think the chicken/egg problem applies here. It applies to e.g. dating sites because there are other options (e.g. other dating sites, bars, etc.). In this case, a ton of people want to work remotely and there is no central place to find that. Now I know of one place, so I'll definitely be checking it often.
I doubt running this site costs so many resources that they NEED to be charging right now.
another option would be to leave the charge now link and go out to craigslist, dice, etc and be like hey! want to have your job listed on our site for free?
They might seem a lot more expensive, but when you're looking to hire a new employee (an expense on the order of tens or hundreds of thousands of dollars), the difference between $75 and $500 to advertise the position isn't really that significant.
In addition to what csomar said, for a small business or someone looking to hire an independent contractor, I think many advertisers would consider $425 to be a huge difference. But, I think a lot of potential advertisers would consider $75 significant in the first place.
But for me, charging advertisers a significant fee is valuable to establish that they're serious about hiring. That's the rationale behind the fee structure on my site http://WheresTheRemote.com/ . To me, an advertiser paying a fee of something like 1x or 2x the hourly rate they're advertising (for an independent contractor or employee, respectively) is a token of their sincerity about wanting to hire and pay the rate they advertise, which the site requires them to include in the ad. Conversely, unwillingness to pay such a fee makes me concerned that they would just waste the time of the job seekers visiting my site and I don't want to publish the ad, since quality is an important goal for my project. Of course, having a decent amount of traffic would help establish the value proposition for advertisers to pay such a fee.
You are here assuming that this source will bring enough traffic to be your only source? Otherwise, you'll need to advertise in many sites and at that time the price makes a difference.
Why would someone pay money to list their job on a site with no traffic?
Why would someone go to a site like that if you only have a dozen jobs?
This can be something good...but they are shooting it in the leg by being greedy