PPP has too good of a reputation to skew their polls for their clients.
The record shows a house effect for whomever is paying for the poll. It's a slight one (a few points), but it's a house effect nonetheless. This happened with the Senate races PPP was doing for an advocacy group prior to the 2014 midterms. PPP followed with their own polls that were on average a few points more favorable to the Republicans.
Keep in mind that the client in these instances will likely control what gets released.
With that said, this one is a little better than some of the obvious partisan polls PPP put out last week that were RV instead of LV. PPP usually just puts out LV polls, but the SC poll for the Democrats was RV for obvious reasons. The Missouri poll went back to likely voters.