I think binance has a strategy for conducting an IEO which depend mostly on the amount of BNB token that a participants holds. However, just like you have said that in the past, you can make up to 10x by participating in IEO launched on the Binance launchpad, but now a lot of people holds more BNB token and most time when the coin get listed, it is being dumped immediately so I believe that it is not about binance IEO getting weaken but there are have been less demand for most of this tokens when they get listed. The same thing applies to some of the DeFi token such as FLM that is being listed on the platform. If you invest on IEO and makes 2x your investment, I think it is still great because hardly will you see any project that will get its token price rise to 2x on most exchanges.
Getting 2x profits from my investment is more than enough for me, I don't know how people can be so greedy, this year on one or two IEO that took place on binance platform brings 2x for investors, so I don't understand why people are making big deal out of it, this doesn't mean it's over for binance IEO, whatever xx you are going to get out of any binance launchpads depends more on the adoption rate of the token so choose wisely