Interesting subject, I was going to create a new thread and then found this one.

So it looks like IDO is the trend theses days with polkastarter, ignition... However you have to buy and hold their token.. 250 POLS for polkastarter and 1000 PAIDS for ignitions. Now as prices are low let's say it's a good option to buy theses token now. One bought you get whitelisted and can apply but you have to be lucky enough to win the lottery. Then depending on the platform you will get a certain allocation. You will then buy the token you want and pray you make money but also pray that the tokens you are holding are will not drop in price. It's a double risk. Another parameter to take into account is that while not yet listed the token price could increase as buyers are limited but once it get listed the price could drop... Too complicated for me I prefer IEOs