Recently, newsletters have been barely anything but overpriced keyboards and awful-looking keycaps--with the exception of a single knife in each email past a week ago. I feel like this site has entirely lost its roots--and will likely pay for that with their business. It's going to eventually wind up not dropshipping items, which would otherwise pass savings on to customers, and will instead be the sticker store of keycaps.
I'll admit, sure, the majority of the userbase probably doesn't mind the fact that you've moved to be a purveyor of only that type of product, but it doesn't make much sense to eliminate the rest of your would-be customers. You could only stand to lose in terms of potential profit with the business model Drop has had in the past; i.e not putting in an order if a product doesn't receive enough interest. To be perfectly honest, I'm shocked that this even has to be said.
Reducing types of products on the site means reduced web traffic; reduced web traffic effectively equates to less word-of-mouth advertising via a reduction in social media engagement; and less free advertising means more money spent trying to keep your name out there... which in turn, means less profit.
And if you lopped off every other category because you couldn't turn a profit on those types of items... maybe try negotiating a cost and resale price that puts you in the green from square one. If that isn't the case, I'd love to hear the rationale behind the decision.