Yes. You retain all the rights to your content when you publish through Pothi.com. So, you can do whatever you want with it. Pothi.com has no objections to these at all. You should, however, check the terms of the other places you are putting content on to ensure that they also allow this non-exclusivity— check whether their terms stop you from publishing your book through Pothi.com. Ensuring compliance with the terms of other parties you might be dealing with is solely your responsibility.