The problem is the length of time between updates. I wouldn't complete a chapter except every few months. I will be working 46+ hours a week over the next year or two at least with my internship in India. So I won't be able to give updates often, so most people would forget what they last read. As you mentioned, I'll be able to give hopefully at least one page a week and it'll still be fresh in memory.
Plus I DO want the most possible views, as greedy as it sounds. I want this comic to eventually become my job, and for that, I need exposure and views. I am willing to cater to people who prefer different types of reading. I plan to do only the page by page on Tapastic and then both versions on dA. If anything, there will be one update a week and two updates every other month or so. I don't really see how that's too much? Some people post drawing every single day, so once a week shouldn't be a problem. Between the three versions (2 on dA and one on Tapastic), that should cover everyone. :'D