Yes, but they don't have the penalties for the number of trades, because they are new teams and so they haven¡t still traded any players (I am always around 14 players traded in the last 14 weeks so the taxes are high for me)
Also, if you buy a player for 10k and you sell him for 100k you still get a benefit despite the taxes. But if you buy a player for 800k and you sell him for 1M then a tax of 20% eliminates the benefit.
So in my case, with hattrick experience, I made big easy benefits my first season, and I no longer can use the same strategy, both because of the taxes and because of the salary and prices of the players that I need now.
I also learnt a lot about the game by trying many different players in the process.
I recomend any new manager who wants to spend time in the market (specially with hattrick or previous BB experience) to try daytrading to give a fast start to his team.
The kryptonite to this... is daytrading works, because newer managers don't really know what they are doing and they are the ones (usually) buying your players enabling daytrading.
If you tell all those buyers to instead be competitors and other sellers in daytrading, it will take away all the value of daytrading too.