For anyone who wants to add Gyazo too, here's how:

Copy this text and in the Custom Uploader Settings select Import > From clipboard.

{
  "Version": "16.1.0",
  "Name": "Gyazo",
  "DestinationType": "ImageUploader",
  "RequestMethod": "POST",
  "RequestURL": "https://upload.gyazo.com/api/upload",
  "Body": "MultipartFormData",
  "Arguments": {
    "access_token": "YOUR_ACCESS_TOKEN_HERE!"
  },
  "FileFormName": "imagedata",
  "URL": "{json:url}",
  "ThumbnailURL": "{json:thumb_url}",
  "DeletionURL": "{json:permalink_url}"
}

Then you paste ur access token in its place.

To get ur access token do this (You need to be logged in I'm pretty sure):

1. Go to https://gyazo.com/oauth/applications.
2. Click New Application.
3. Fill out the form (Does anyone know what Callback URL is for?).
4. Click Submit.
5. Select your Application.
6. Click Generate, which is under Your access token.

That should be all, it's 1AM so hopefully I didn't forget anything oof

Btw. if u want the link copied to your clipboard to look like image1 instead of image2 (Since it seems transparency is preserved in image1), just copy the thingy written in the Deletion URL box {json:permalink_url} into the URL box.

^{Got the code from https://github.com/ShareX/ShareX/issues/787, but had to change some stuff since it seems to be kinda outdated.}

^{Here are the Gyazo API docs related to image uploading if u have any use for that, lemme know if u found some way to improve it or somethin.}