Some hispanic dude who works for the local government bought it so his mother or grandmother could run a day care. The city fined her for not having an adult in every room so she had to shut it down since they could not afford to hire an employee to run it legally.
It's easy to see why it blew up:
1. The first response on Reddit to the simple question of "wtf is this" came from a guy who claimed to have worked at Area 51 and who said it was a child trafficking center.
2. Reddit immediately shut down the story, causing a Streisand effect and a presumption that the Area 51 poster was on to something.
3. The local authorities got grouchy as people started calling in and scoping and vandalizing the place, causing people to presume that they must be hiding something.
4. Reddit continued censoring the story, keeping interest going over time.
5. A shipping database listed the place receiving imports from China. Another anon said his business was in the database for transactions that were not theirs, so it looks like that database was broken.
6. Some Ryulong-tier linguist said that the day care's name advertised a whorehouse in Spanish. It didn't.
7. Other speculation built on previous speculation.
The only solid info that I saw is the citations that the day care got, which explains why the place was empty. I don't know if the rabbit has ever been explained.