I saw that when I stopped uploading images to my own server my content on Google Images disappeared. I stopped uploading images to my server for two main reasons: traffic and storage space on the VPS.I've a big enough site I got +15k unique visitors per day and my site is mainly images based, there's at least 15 pictures per post, 3-4 posts per day every day. My VPS has a 200GB (can be expanded) HDD of space and 3TB traffic per month. Because of all these numbers I've started to upload the images to sites like imgur & Tumblr, mainly... but now all my stuff is gone from Google Images, there isn't a single image of my site when trying different queries associated with the posts, only exceptions are some old pictures that are hosted on my server. So it is obvious that Google doesn't like the fact that I upload the images to external sites, is there a way to tell Google to link those pictures to me in some way? What you think it is better if I start again to upload the images to my own server instead of Tumblr & imgur?!
Image rankings on Google Image Search (images hosted on external sites)
seo;google;google search;images;google ranking