In IEO website there are no minimum and maximum information to buy tokens, so will there be a purchase limitation? Discount for those who want to buy a high quantity?
If you think logically, then the minimum contributions should be when buying a token, so that small investors can buy tokens for themselves
I think it depends also on the exchange where they are going to conduct their IEO, what are their agreements? But most of the time, if it is IEO, it is first come first served basis. If you can get in, then, it is up to you how much you will buy. Maybe, this is the reason why the team doesn't give their limits when it comes to the purchase of the tokens.