Since the advent of free agency, owners have fought for compensation in cases in which teams lose a prime player. Think about Gerrit Cole leaving the Astros last winter, and Anthony Rendon departing the Nationals. Over time, fewer and fewer players have been tied to compensation -- draft-pick compensation, under the current iteration -- and it's possible that could go away once and for all in the next Collective Bargaining Agreement.
There will be more free agents than ever this offseason, maybe something in the area of 300 once non-tender decisions are finalized, and between that huge volume of market alternatives and team payroll rollbacks, only six players received qualifying offers (for $18.9 million, this winter), linking them to draft-pick compensation if they decline and sign with another team. This is the fewest under the QO system, as these numbers sent along by Sarah Langs reveal:
2015: 20 (3 accepted)
2016: 10 (2 accepted)
2018: 7 (1 accepted)
2019: 10 (2 accepted)
Evaluators and agents were asked which players should or might accept, and this is feedback on the six players: