I'm wondering who at Ryanair is stupid enough to not realise that people don't want to stay, and introducing bond after bond isn't going to change anything - if anything it'll make people want to leave even more. Just like when they stopped allowing pilots to unfreeze their ATPL during the bi-annual simulator events. They think they can imprison people into staying, rather than enticing them with improved terms.
The exodus will continue, there are too many better options on the table right now.