HPX does support certain tokens' PoS, including HC, Qtum, DCR and DASH. There are two kinds of PoS: Normal PoS and Special PoS.
Normal PoS supports HC, QTUM and DASH. As long as you deposit your tokens into HPX wallet, we will automatically do the PoS for you.
(For example, DASH's PoS reward will be confirmed with a 24-hour period and issued on the next day)
Special PoS supports QTUM, DASH and DCR. You need to transfer tokens to the special PoS pool in order to receive special PoS rate. Confirmation time and PoS period will be available in the PoS reward page.