PPS and PPS+

PPS (pay per share) pays a fixed amount for every valid share you submit, whether or not the pool finds a block, so the pool absorbs all the luck and usually charges a higher fee. PPS+ adds a share of transaction fees on top of the fixed subsidy portion.

Which scheme this pool runs for pool mining is shown on the HeroMiners hub, on the All Pools overview, so read it there rather than assuming. Under a proportional scheme you earn your share of each block the pool actually finds; under PPS+ you are credited per share, with transaction fees shared on top.