I would normally never open limp. However I played on Party a bit recently and often the PFR of tables was so low that I could be fairly confident of not getting raised. I would sometimes open limp drawing hands like SCs and gappers. I did it very rarely.

The plan for profit was to only play for 2 pair or higher, or to bet out my opponents if there were only a couple of really weak players in the hand.

I'd never seen tables that passive before, so I doubt I'll be trying it again.