there's never a guarantee, public chains are not ran or created by companies but by decentralized network. however, any chain not using distribution swap will suffer issues and will not be directly supported by their company. most ICO's don't care much for decentralization or distribution so you don't see that often. e.g. https://steemit.com/eos/@cob/shedding-some-light-on-the-eos-token-purchase-agreement or https://steemit.com/eos/@tolkatore/all-eos-scam-signals-dispelled-in-one-bite-sized-video