The beauty of leaving Ryanair early is that they not only sue you for your outstanding bond, they also sue for the replacement pilot to cover the 'shortfall in your contract'. As you will be aware the shortest pilot contracts are 6 months. So any clever clogs who suggests you just up and leave after 500 hours needs to take account of what extra costs you may be up for!
Our IALPA rep has called Ryanair a 'parallel world.' What is normal practice elsewhere isn't necessarily that way here. Of course vice versa holds true as well, normal at Ryanair may make the hairs on the back of your neck stand up! Invest wisely and become a lawyer, earn lots of money and fly as a hobby.
That is free advise, you would be wise to take it.