Heavily related to this question, as of now, Unity's TOS has changed dramatically. And searching in the TOS, it looks like I'm allowed to remove the Unity logo in my exported game. Looking at Section 4.1, it still retains:
You will not remove, alter or obscure any copyright, trademark, service mark or other proprietary rights notices incorporated in or accompanying the Services.
However looking at how "Services" is defined in the first paragraph of the TOS:
Unity Technologies ApS (“Unity”, “our” or “we”) provides game-development and related software (the “Software”), development-related services (like Unity Analytics (“Developer Services”)), and various Unity communities (like Unity Answers and and the Made with Unity Platform (“Communities”)), provided through or in connection with our website, accessible at unity3d.com or unity.com (collectively, the “Site”). Except to the extent you and Unity have executed a separate agreement, these terms and conditions exclusively govern your access to and use of the Software, Developer Services, Communities and Site (collectively, the “Services”)
It does not seem to include the exported game itself. And even if Section 4.1 says "accompanying the services", I assume it still wouldn't include the game as the game does not need to accompany them. Otherwise it would be illegal to remove the logo from the splash screen from a game made in Unity Pro since the TOS applies to all tiers of Unity. Furthermore, I haven't found anywhere that says you can't modify or hack into the produced executables (I even looked in here which contains another part of the TOS). Does this mean I can remove the logo from the splash screen no matter what Unity tier (personal, plus or pro) I'm using?
(My aim is to actually move it to a dedicated credits section accessible from the title screen of the game rather than having it appear in the splash screen. Players of the game will still know that it's made in Unity.)