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Addiction is forming in a gradual way in the course of which the gambling perceiving as the activity that you can't go a day without. Addicted gambler thinks about it every minute and tries to find an easy access to it. Online gives him/her such chance, stepping up his/her addiction. Thus, unswering your question, I would say YES, "online gambling lead to more addiction".
The beginning of trying to play to just get pleasure and in the end it becomes an activity that is done regularly eventually triggers the process of addiction, I think that all of us cannot avoid it will addiction happen for anyone who is too focused and immersed in gambling so far, so it should be for us to gamble responsibly and also have limits not only in terms of finance but also in time, besides that too easy access to online gambling allows everyone to be able to access it and this is why often someone forgets the time when play.