Final Fantasy XIV
Players use placement timing to float furnishings off the floor and create layouts far beyond the housing editor's apparent limits. It is one of FFXIV's most famous building exploits.
Because many effects resolve on server ticks, players can survive or optimize movement through mechanics by timing actions around tick boundaries. High-end raiders often exploit this predictably.
Certain boss arenas and dungeon pulls allow players to break vision with pillars or corners while preserving beneficial cast timing. It can trivialize parts of encounters.
Crafters and resellers sometimes flood or pin prices in small increments to trap competitors into bad repricing behavior. It is a persistent economy exploit in thinner markets.
Melee players hug oversized boss hitbox edges to keep uptime while dodging mechanics that seem like they should force disengage. It is a subtle but famous collision exploitation pattern.