[pnw]

It's not uncommon, it's happened to me twice.

Basically an NPE files a lot of lawsuits at once, legal companies are monitoring the lawsuits and will proactively reach out to potential customers.

In my case the firms that reached out were mostly tier one national law firms and they were very familiar with the NPE. And like the OP I was unaware of the lawsuit because they served our corporate agent in Delaware. So it was quite useful.