I just subscribed to iDrive Photos yesterday. There is a dedicated backup plan with 0.99 USD for the first year. This is amazing, given the unlimited storage, with full resolution.
I allowed 3 phones (my phone and 2 family members) to sync their pictures into the cloud, and here is my finding:
I can see duplicated photos (most likely original photo taken by one of the phones followed by the photo being shared via WhatsApp). In the Photos gallery of the web interface in iDrive there is NO way you can differentiate the original (max resolution) from it's duplicates having reduced size by WhatsApp.
This sort of features are NOT described in ANY review I read about before subscribing for the plan. Maybe I should have to start writing my own reviews...
I thought I need a cost efficient photo backup, but it seems after just one day that I was wrong. I have canceled my iDrive photos account and got my 0.99 USD back in minutes. I'll be looking at more advanced cloud backup photo services to allow an easier way I can pick and select photos for my yearly photo album that I send for printing every January.