What characteristics and skills do you see your best coworkers, agents, clients and competitors having and using? 

No, that's what most of your competitors are offering, or no inspections.

I also need to know who my "competitors" are.

Make as many contacts as you can and they can be "competitors"  a calculator from BP will help you not miss important things.  

On the other hand, should I also expect more investor(s) / competitor(s) to show up on these auction?

I wouldn't be surprised if both major sites are penalizing you for having a listing on the competitors site.

For example having a quality list, compelling message, and a mix of different mail pieces that appeal to different customers and helps differentiate you from your competitors.

You have to drag them into your price range and only you (or your competitors) can do it.

Disclosure: I am Director of PR for DoHardMoney@Jessica Martin - you can reach out to me for any clarifications, and I can point you in the direction of testimonials and satisfied, successful buyers in addition to any that post hereAt DoHardMoney we do things a little different than most Hard Money Lenders and as a result we’ve disrupted things in a way that competitors feel the need to raise doubts and concerns about our systematic approach and our business model.

Upgrade your property, rent to professionals, keep your rent a little lower than the competitors to entice more applicants and keep the tenants wanting to stay.