Basically, companies like LBSR offer people special deals to purchase company securities in order to raise money.  Or to reward people when the company can't reward them with money.  Form D is required to notify the SEC of these deals and who participates in them.

The deals can be ongoing - the 'deal' specified in these last three Form D/A filed originated in November 2018.  Anytime something happens involving the securities defined in the original package, a Form D/A(mendment) is required to be filed, so that the public and shareholders know what is going on.

But you are right - nothing new or exciting.