Just to clear up some slight inaccuracies...there was never a class of 3...but there were some no shows.
Its getting quite predatory in recruiting, I was told that some airlines are poaching by contacting candidates and telling them if they have signed job offer from another airline, to send it to them and they will be hired, often with a bonus. Beware that bonus is fleeting
Candidates needs to understand that flying a jet is flying a jet, it all looks the same out the window from up front...the real difference is pay and work rules. Do your research.