Many pilots are against paying for a type rating but doesn't it amount to the same thing!
Airline A (RYR) - pay for your own rating but earn more money
Airline B (FLYBE) - get bonded for a type rating but earn less
I think any sensible person would do the maths and should Airline A be the best option financially, go to the bank and take out a loan! Obviously there are other factors, the biggest being risk. Others could be pension schemes, rosters and the list goes on.
And I must agree with VJW on one thing, a B737 rating is far more useful than a Q400, that's a no brainer. An international job search will throw up plenty of jobs for the 737 and A320 family. Ultimately its up to the individual to decide what suites them best and not criticize others for their decisions.