You need to protect your business/product's name
If you want to brand and protect your name, we recommend that you at least register the .net version. If you are an organization, we would also register the .org as well. This does several things. It brands your site and prevents others from copying your site and calling it yourdomain.net or yourdomain.org. Some nasty souls may even use these names for unethical purposes or sites that promote pornography. That will do great damage to your business or image of your organization. You do not want to be found in such awkward situation.
I would have to try to offer it to jumpthesh rk.com people or try to copy the site to break any domain laws from what I can find on the net about this subject. Otherwise why would a business buy all the .com .net .orgs for themselves. They should just wait for someone else to register it and then take it from them? Just because you trademark 3 regularly used words, doesnt give you the right to own all the .net, .org, .ifo names.