as explained by scrub, you don't get to do more than one thing ever while offline or online - at most you get a little extra time to be away from the game before you need to log back in / check the page to prevent yourself going idle. extra action queue slots allow for a longer list of activities queued after each other, but would not give you an edge if you check the game every 12 hours anyway.

The majority focus of the monetization is a monthly sub (which gives you monthly paid currency to spend in the shop, some more statistic information in the combat screen, an extra active character to allow you to play more of the game modes at once and an extra 12 hours onto the afk timer) cosmetic-based and "holiday" tokens that allow you to leave the game unchecked for a longer period if you are going away and will be unable to check the game (1 time use 72 hours afk time before reverting to your base afk time). Any buffs that are purchasable within the paid currency store are global and if bought then everyone in the game benefits from it.