Offers without initial viewing?

[Sankalp Pandya]

Trying to understand if what I'm observing is just because of the current competition in the markets or if it's always been like this, but currently, whenever I find a property in Bergen/Passaic county and try to arrange a viewing through my realtor I find out that there are already a couple of cash offers being made. This is in a matter of a couple of hours from when the property is listed. 

Which made me think are other people really making offers without viewings? Am I missing out on some contingencies that allow these people to make offers that give them protection to then walk away without at least having the initial viewing? 

Maybe they are lucky and are able to get exclusive access to the property?