If you have installed Office 2003 and above, you can compress a whole collection of Pictures with Microsoft Office Picture Manager.
The best way to do that, is if you apply a Copy of the folder you wish to compress. Then you'll open one Picture with Microsoft Office Picture Manager.
On the top you have a Icon to view all thumbnails of this Folder. Then press CTRL+A
On the right side then you could click the edit pictures button and then the copress images button.
There you choose a compressiontype and Then klick on Ok.
Then the programm will compress all selected images.
At least you click on the save icon to save the changes.
Then you could upload the images with less of traffic and more fast.
Concerning to the €15/Month i can't give you some Informations, because i don't know the customers side of this plattform.
So for this question you may to ask the management over the following address: "[email protected]
Kind regards Michael