The methods you are quoting above do not add something to any particular campaign, i would prefer you added them to something value of some sort.
Blog post comments within industry settings can always be usefull along with article submissions but all of this needs to be controlled rather than spammed so you can have an overall reach with the methods that you are using.
Press release Submissions are valuable but again need to give the user added value to what your actually talking about. I,m hesistant to think the kind of press releases you can spam weekly, that will get you what u desire as opposed to an industry related release that might somehow give someone added knowledge that may induce a lead, a sale or otherwise
Strategy is key to the above campaign and i hope you plan accordingly either way
Cheers ROb