Thanks for reporting. This is important to know.
Not a bad thing if there was serious evidence of exploitation.
IME most girls are here of their own free will to earn more money than they could ever dream of back home though.
If it's the well known places, then it would be the latter. The many ladies I've met are here of their own free will, happy and earning a lot of money which they will use either to support their family, invest, or buy a property when they return home. They are not locked away, but free to leave at any time, they will typically take a holiday and sight-see, and will return home within 3-6 months without overstaying the allotted time on their visas.
It could be more that they were seen as a nuisance by nosey neighbors, which seems to be the most cause.