Paypal currently has 2 ways of dealing with marketplaces, Adaptive Payments and PayPal for Marketplaces. A developer for the Ruby SDK of the Adaptive API informed me it was being deprecated, and I have read on this forum references to Reference transactions which are definitely deprecated.
For those of using PayPal (I’d rather use Stripe myself), which way have you gone? It seems that Marketplaces is a relatively new API.