1) He's speaking of F/O seat, gents.
2) Fixed, short-term employee or a contractor are two seriously different things. I do not think the second is possible in France, though.
3) Apart from the most senior 30% of the pilot pool, any TVS pilot in Prague (company's seat) would leave for RYR if PRG was a possible base. Several did only on the hope of getting PRG base later one day.
4) I think RYR is a VERY GOOD place to be at the beginning of the career, to develop the skills and soak the responsibilities. Such boot-camp will do much good for the latter years.