Hi there.
In my opinion, I like Huobi's IEO than Binance's IEO. Right, Binance IEO require the smaller days of holding, but the price of BNB is dumping everyday. But HT isnt, it's price increase everyday, and hard to dump (except BTC dump, all alts will dump). And the Huobi's IEO help us better profit too. From x4-x10 until now, but with Binance's IEO, some IEO is having x0.5-x2 now.
I believe that both of these exchanges are good in terms of conducting IEOs and I am happy to participate in investing in these exchanges. Of course, I would like it not necessary to constantly store their tokens, however, I understand that in this case, the price of tokens would constantly fluctuate greatly before and after the IEO.
I advise you to participate in IEO on both of these exchanges.