I have seen these offered in softer type markets sometimes but in a strong market there is not a lot of need for buyers to deal with these alternatives much.

I listened to on the the BiggerPockets podcast how someone suggested that you put in an offer early so that it locks out other buyers and then use the inspection or other contingencies to back out later if you want to go with another property or the current one ends up not being as good of a deal... 

ok so i checked it out the page that you provided isnt their web site its a squeeze page which is geared towards getting you to sign up by offering to give you a free e book which in turn gives them your contact info which adds u to their buyers list or private money lending list and all that depends on the page it self you might want to look in to doing more research on them of course so always do your due diligence when ever you deal with any one 

At the main monthly event, and every other Tuesday at DEALS DEALS DEALS meetup group, there are many awesome wholesalers / flippers / buyers / lenders to network with.

So let's say the seller has a mortgage for $80,000 and the buyer agrees to buy the house for $100,000 with $10,000 down.

Then the investor assigns the agreement to a tenant buyer with the approval of the seller and the tenant buyer assumes the rights and obligations in the lease option agreement and the investor collects the assignment fee and moves on.How would a real estate agent assist the investor in this process?

It’s no secret that Dubai’s Prices are dipping every day more, and that nowadays buyers are in high demand.Some sellers are surprisingly negotiable as it seems that all they want is to exit. 

I'm new and don't have a list of buyers.

As such I pay my bills with todays income not tomorrows.When I sell if there is gravy it's a pleasant bonus. 

Moral of the story, delve as deep as possible and get all the facts, you might be pleasantly surprised at the outcome :)