To anyone who has used Polkastarter to invest in IDO's, in your experience,
I rarely got a spot to get in. Too much people interested to join in IDO. Increasing your stack was only the way to get more ticket and increase the chance to join in IDO. I didn't see another way other than become a lucky guy who can get a spot with only one ticket. It's having lottery system which makes people that was holding a single ticket to participated in. I have been trying that so many times but you will be so lucky if you can get it with only one ticket.
how often is the United States on the list of prohibited countries when you try to apply for entry to the whitelist? Also, what is the typical window of time that whitelisting is open to applications?
I think that polkastarter itself who already prohibited US citizens to participate in the IDO due to the regulation. You have to read polkastarter's faq regarding it. I'm not sure if this is based on the project that's launched in polkastarter.
Persons located in or residents of the United States, North Korea, Iran, Venezuela or any other jurisdiction in which it is prohibited from using the Service (the ”Prohibited Jurisdictions”) are not permitted to make use of the Service.
source:
https://polkastarter.com/terms