Mods and cheat engine

[JanVanding]

Also to put up the actual rules so people better understand.

2.1 Cheating and Botting. You may not create or use any unauthorized cheats, bots, automation software, hacks, mods or any other unauthorized software or hardware designed to modify the Game and gameplay. In addition, you may not take advantage of game system bugs and exploits during gameplay.

Cactbot and ACT do not modify the game or gameplay therefore are exempt, nor are they using any exploit or bug. ACT and its plug ins (such as Cactbot and Hyabasleep) has worded exemption from Yoshida himself but it should be used sensibly and not as a tool to harass or bully.
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This next rule is important.

2.2 Real Money Trading, Farming and Power-Leveling. You may not sell, purchase or exchange for real-world money or value any in-game currency, accounts, characters, in-game services, or in-game virtual items. You may not play the Game for the purpose of acquiring virtual items or advancement in game play on behalf of a third-party or for the purpose of selling any virtual assets to a third party for real-world money, specifically including "gold-farming" and power-leveling services.


This is an ongoing and very real problem. Selling Ultimate clears by piloting someone's account for example is RMT and strictly against TOS, there's no special exemptions given here, nor will there ever be.
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This is the rule where people's argument even without exemption falls apart.

2.6 Hacking and Circumvention. You may not hack, disassemble, decompile, or otherwise modify the Game or server computer code, whether the Game code is located on a DVD, Blu-rayTM disc, your computer/console or on Square Enix's servers, except as expressly permitted by Square Enix or applicable law.

ACT reads client side network data, it does not inject packets into the server and does not interfere with the server code. There would be very noticable lag when using ACT and its plug ins if this were the case and it simply doesn't it reads the network file Client side, your own data. Anyone claiming otherwise is spreading lies or does not understand how ACT actually works.
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Now this one is the one people misread a lot.

3.2 Disruption. You may not in any way disrupt or interfere with the Game experience of other players, including the disruption of Square Enix's computers and servers

This includes harassment in all its forms, Witch hunting, bullying, stalking and making nuisance requests to GMs to ban people for doing nothing that affects your actual gameplay experience.

Thems the actual rules.

[Apeachs]

2.5 Data Mining. You may not intercept, mine or otherwise collect information from the Game using unauthorized third party software.

ACT is unauthorized third party software and it collects data from the game. And players can send collected data into services like fflogs.

Very nice you took up the rules

And about the Witch hunt part. Im sure heavy users of mods might feel this. But again no naming here on the public forum.

It's simply not allowed to modify files.

2.7 Modifying or Creating Derivative Software. You may not modify or cause to be modified any files that are a part of the Game or Service in any way not expressly authorized by Square Enix, and may not make any derivative works of the Game.