Easy Swiss take a mix of age groups as FOs. Mainly younger guys yes, but it is by no means a hard rule.
They take guys from many backgrounds - ex military, from other airlines, cadets, and corporate.
I believe it is a bond for the new guys for the rating too, rather than a payment. But I am not sure. Either way, if you have to pay up front then make sure you do so in Sterling or Euros. With the strength of the Swiss Franc against the Pound/Euro you will pay back the rating in no time provided you don't live in expensive Switzerland. Many people live just across the border in France. This makes the salary go a long long way, and so a type rating repayment would be a short term rather than a long term investment.
From what I have seen, all new joiners do their rating with CTC, and consequently I imagine any bond/payment will be in Sterling. Good news.
I would recommend it as a good option for jumping ship. Not perfect, but a good job with great pay.
Good luck.