Holy fuck, saveshutter went down and everyone are losing their minds with the method.
This method won't give you vectors nor files above 1000x resolution.
It's "bug" used on facebook; facebook is partnered with shutterstock. Therefore while making ads you'll get the option to use photos from shutter. Since fb have access to their library you'll see photos without watermarks.
There are bots doing this for you.

1. Go to https://www.facebook.com/J2TeaM.pro/
2. Write message "shutter" or "shutterstock". You'll receive response in Vietnamese.
3. Send a link to pic you want.
4. You'll receive download link.

There. You just save yourself 5$ for method available for free.

Feel free to drop 1$ for saving you for wasting 5 times as much.
1Kg5n5SF5n5vYMGwr9d6q1ybd8wa4rqRMV