The problem is we acquire talent that can easily slot into top teams when we Everton our own season and fail to reach europe these players will want to move onto teams that can reach europe on a more consistent basis.
Gana doesn't look out of place in the CL, He also wanted to move to a highly more decorated team.
Digne wouldn't look out of place in any of the top 4 in the PL or even some CL teams and I wouldn't be surprised if he will be looking to move soon, It's cat and mouse. Every player has it's price e v e r y player regardless.
If someone offered mega money for Harry Kane today he would be offski.