Can I add my not fishing related website on my profile in order to completing it? 

On your profile page is a link to 'Edit Profile' the page. (top/right)

 

Down that page is where you can put in your site.

You can put it there...anyone looking at your profile will see it in the left column.

Am I allow to do that? it is not fishing related.

There's also spots for Facebook, Twitter and Instagram - how much of those are fishing related?

perfect, going to put it there. I just hate to see my profile is not complete.

 

I checked out your site. That's a pretty neat gig you got going there. Do you sell these items to production companies or do they rent them? I have no idea how that works. lol

12 hours ago, jbsoonerfan said:

I checked out your site. That's a pretty neat gig you got going there. Do you sell these items to production companies or do they rent them? I have no idea how that works. lol

I sell and rent depending on their project, Also sell to individuals(aviation Geeks) who collecting aviation items.

I am glad you like my website.