Do Players intentionally Auto Resign?
It is their only strategy a lot of the time. Being new to chess most people hear of this mate and they go on doing just what you described. This has a silver lining to it though, due to the fact you are gaining points you get stronger players and they will not do this.
You automatically resign the game if you click the white flag unless the confirm resign button is on.
Many people who auto resign do it when they're in a losing position. It's basically unsportsmanship behaviour - they're losing and don't have the gall to resign. You're able to report folks who do this, chess.com has a default option for reporting players who stall or abandon games. It happens so frequently these days though which is annoying