There are a ton of topics on this. Vacation mode for Daily games does not mean they have to avoid the site. A player may not have time to dedicate to a bunch of Daily games but still have time to read some forums, do some tactics, play a few games of blitz, etc.
The site has a pretty specific definition of what constitutes vacation abuse.
https://support.chess.com/customer/en/portal/articles/1444860-what-is-vacation-abuse-
any thoughts on how we can improve our games with regard to time abuse by opponents? I am of the view that when a player visits the site while on vacation and refuses to make a move that they incur a time penalty - right now I experiencing the situation of a player refusing to play out holding everyone in the tournament hostage -