Try not to over-think Dropbox links. I doubt they could make it any easier than it already is.
There are links to everything in your Dropbox. You can share anything you want to. Either individual files or folders or individual files within folders.
Simply right-click on the file or folder you want to share in your ‘My Dropbox’ folder and click on Dropbox and you’ll see your options.
If it says ‘Copy Public Link’ as in the case of your Public folder, that means when you click on it it will go to your clipboard. You now have to paste it somewhere else.
If it says ‘Get link’ that means it will open the content in your browser and you’ll need to copy the link from the address bar.
As Dropbox has been in development, they’ve handled links in a variety of ways, but this is how simple it is as of now. There are no longer specific ‘shareable links’. Anything can be linked to as described above.
You can also create links to files when you’re logged into your account which you may want to do if you’re not at your home computer.
If you invite someone to Dropbox, either through a shared folder or just a link, and they accept and install Dropbox for the first time, you will both receive a 500MB bonus to your allotted space on Dropbox. You can have up to maximum of 18GB total on a free Dropbox account.
Your personal referral link can be found inside your Dropbox account. Just log in with the username and password you used when you first signed up. If you don’t see it anywhere else, look at the footer on the page under Community where it says ‘Referrals’. That will take you to a page where you can send invites or copy your referral link. You can paste that link into emails or web pages. You can also click through on ‘view the status of your referrals’ where Dropbox keeps track of the referrals in your account.