Current USPHL teams are all Tier 2. No real Tier 1 teams have signed on yet
Tier designations in junior hockey and youth hockey are completely different and unrelated. In junior hockey, Tier 1 means that it is 100% free for players to play (USHL), Tier 2 means players play for free but pay billet fees and some other assorted costs (NAHL), and Tier 3 means it is pay to play (USPHL and others). While the USPHL's top "Premier League" is currently pay-to-play, the widespread belief is that the league is trying to switch to a Tier 2 model within the next few seasons.
Whether the USPHL juniors are considered Tier 2 or Tier 3, wouldn't impact the youth organizations Tier 1 status for USA Hockey if that's the direction the league ends up going with its youth division.
changing their name to E10