And when Crypti will became more alive and promoted devs can sell again on ipo price.
Because quite simply that would be using up valuable IPO funds, which are needed to help Crypti achieve its goals. Putting up a huge buying wall would be counter-intuitive to the IPO. There's no point if the devs own 2x the amount of XCR, when there's no liquidity in the market that they can sell into (which they need to). Remember the devs have to convert their IPO holdings to USD to pay for work to be done on Crypti, such as design work etc.
Are you saying 650BTC (=750-100) is not enough to "pay for work to be done on Crypti, such as design work etc"?
Do you understand that buying 100BTC Crypti at half ipo price and selling them on ipo price will bring devs new 100BTC?
Or may be you do not think that Crypti price will ever reach ipo level again?