Whole industry is one big knock-off orgy and I'm not at all surprised.
Truly unique and innovative products are few and far between, and the vast majority of new Widgets are merely variants of an existing Widget.
Imitation products should be expected and of little surprise, so best to make sure your Widget is the best Widget and let the chips fall as they may.
Unless your Widget is really special, seems like the most a Patent can offer is to fend off the Wolves longer.
The more unique your Widget is, and the deeper your pockets, the more time your Lawyers can buy you.