This is especially true when "iSomething" is free. A lot of folks will want to 'buy in' to the software, out of guilt or gratitude, so will pay for "iSomething+

This is especially true when "iSomething" is free. A lot of folks will want to 'buy in' to the software, out of guilt or gratitude, so will pay for "iSomething+" even if the delta is trivial.