What choice do they have than to give enough space for investors to have enough breathing room, but yet it shows that the zeal investors once had towards IEO is going down faster as most the IEOs nowadays aren't what they used to be. On the other hand too, IEOs will continue to be slower untill eventually it stops because investors are fade up too, imagine holding an exchange token and not able to participate in the IEO and the token dumps on you; also no new thing other than pump and dump.