Pi Network became very viral and popular because the people who run it are people who are used to being involved in MLM business, they easily find referrals because they are used to doing that. With the lure of getting big profits, they invite people to join, and on average the members are old people who do not understand Crypto at all. So they are easily seduced by the lure of getting a lot of money.
They could be scheming something big to pull off a massive scam. They could also sell the KYC data, I wouldn't be too surprised at this point. What I know for sure is that these guys are intentionally delaying every step, from KYC approval to mainnet migrations and everything. Because something like this should never happen with a project that has been running for 5 years. Their behavior and delay in everything indicate something might be fishy going on. Of course, others may have different perspectives, but as for me, this is my point of view. 
Every wise crypto enthusiast who has been on the crypto ecosystem for thr past six years will know that newly launched project tokens, whether with hype or being speculated, might understood that the days of solid projects that could live up to the hype into the future are very uncommon.
Obviously speaking, you may not get the good projects that can stand the text of time before they vanish away.
PI token, in my opinion was just based on hype, not a serious utility that could sustain the market dumps, and the team only succeeded on good marketing strategies that gave rise to the large numbers of the community, unfortunately, the majority of them are newbies, no experienced. Funny enough, many members of the community thought that PI will be higher than Bitcoin price when listed. Some concluded that PI coin will lead the market, but it was a big deception, though many has remains ignorant of the crypto economy and how it works.