As the first of the big changes to XStreetSL(L$99 freebie monthly tax) will be coming soon(sometime between Dec. 18 - Jan. 18), "unintended" consequences are already being clearly seen.
XStreetSL now has a big rash of active item listings that no longer have any items associated with it. This was due to merchants neglecting to de-list their items before trashing their XStreetSL magic boxes. This will force the Commerce team to eventually do a sweep and remove the "dead" listings, but until then these listings serve as a proof of lost income for the Lab: customers can't buy them, the Lab can't get a commission, and heaven help them if they try to extract listing taxes from those dead listings.
So many of the merchants who left now leave the Lab with a significant liability in terms of both monetary and reputational value. XStreetSL's primary strength was it's ability to buy items in a browser and not have to go through the trouble of finding them in-world. With these dead listings, the departed merchants have effectively undermined that strength and simultaneously made alternatives more appealing. And it may get worse when the listing taxes go in effect, causing more merchants to leave abruptly when they are truly faced with the Lab's greed.
Congratulations, Commerce team. You've fostered the creation of content black holes on your site.