Yes, you can share your link on pretty much any platform but you'll have to first "wrap" it with a link shortening service like bit.ly
What this means is you'll be placing your full promotion link into the bitly system, and they in turn will give you a SHORTER link, which you can promote anywhere.
When people click on the bit.ly link it will redirect them to your promotional link... pretty simple.
Here is the flow: bit.ly (short) link >>> goes to your promotional link...
Here is the bit.ly website: https://bitly.com/
When you get there, simply grab your link to promote and PASTE it into the box with the orange button that says "SHORTEN"
As soon as you do that a box below will appear with your new SHORT bit.ly link, which you can promote anywhere... yes even on Facebook :)