You are wasting time on that project. I still don't understand the idea behind this mobile mining even after reading the Whitepaper.
The mining is obviously fake. People who know what mining is know this.
They don't explain it in the whitepaper but you can infer the meaning from their usp and their use of SCP / stellar core.
Pi want to be a non corporate version of stellar, a bit like kin with a bunch of apps of some kind.
In stellar all the coins are created when the network starts. In xlm this went to investors etc and mostly to the stellar dev foundation who put it on the market. In Pi they want it mostly in the hands of users when the network starts.
Since they can't distribute what doesn't exist yet there's an app with a formula that counts up pi per hour. This is the users claim of the mainnet crypto pi. They get a bonus for inviting people.
Currently they have a stellar core testnet. This is it's
horizonit has 2000 nodes and 100k people wanting to run one but it hasn't been made clear how many are full validators vs watcher nodes.