Add side effect details to README

.github/README.md

@@ -4,7 +4,7 @@ A tool to manage a user's account.dat, particularly for Network IDs.
 
 Wii U Account Swap is an elaborate tool that allows the management of a Wii U user's `account.dat` file, located in `storage_mlc:/usr/save/system/act/[PERSISTENT_ID]/`. This allows you to create a backup of (and of course, swap between) both a Nintendo Network ID and Pretendo Network ID. An unlinking feature is also provided for convienence, which will *locally* remove the currently attached Network ID from a user, all without deleting the user or Network ID itself.
 
-Theoretically, this swap would limit needing two user accounts to use both services. That being said, there are likely side effects of utilizing this (such as possibly losing access to purchased Nintendo eShop content while on Pretendo Network). This still needs to be investigated further. 
+Theoretically, this swap would limit needing two user accounts to use both services. That being said, the cost to this is that you may temporarily lose Nintendo eShop purchases, as the system believes that the Nintendo Network ID was deleted. If you happen to run into this issue, you'll need [signature patches](https://github.com/marco-calautti/SigpatchesModuleWiiU) installed.
 
 Note that if you're trying to use a Pretendo Network ID with the same username as an existing Nintendo Network ID, this tool makes it possible. You will not be able to do the same on a Nintendo 3DS, however, without a similar tool on there, such as [FriendsAccountSwitcher.gm9](https://github.com/MatthewL246/pretendo-docker/blob/main/console-files/FriendsAccountSwitcher.gm9) by [MatthewL246](https://github.com/MatthewL246).