When I wanted to upload image, I've always been downloading image and manually uploading it on TalkImg until today and I feel so stupid for not doing this before. As it seems, you can copy the image in the browser and then paste it on TalkImg. The image will automatically be uploaded on TalkImg, so no need to download and reupload them manually.
I don't know how many people know about this but I think that it is a nice idea to give them a hint, i.e. write somewhere that users can copy and paste the image on TalkImg. This will help people to not download and upload it like me, it will save them some time.
I used the same method as you. I always download the image and upload it manually. I didn't know you could paste it directly, like other websites do.
Now, I'd like OP to add an option to their hosting site to edit the image before uploading it. I'm not talking about complex editing, just things like cropping parts, crossing out, or adding simple text over it. Sometimes you want to upload something and need to edit it beforehand. It would be very helpful to have a mini-editor.