Mane wroteHey Vegetaleb, I didn't understand what you meant "you're afraid of the selfishness", you think people will be lazy to buy and deliver things for others?
Concerning your questions, well, since there are so many young Lebanese working abroad and visiting their families often, we hope tink that there won't be a shortage of travelers. Also, you're not risking anything when posting a request: you only have to pay when you found a traveler that meets your needs. This might take time, of course, but you're not losing anything by trying. So who knows, maybe there will be someone traveling with an empty suitcase.
And yes, we unfortunately cannot let people buy the items themselves and send it to the travelers address for the reason that Adlouni highlighted..
I know how Lebanese think, if he has no road toward a shop where you want something from he will say to himself ''I won't go to the other part of the city and ''et3azab'' for only 10-20$'' while the buyer won't pay too much for the bonus fees because all the idea of this website is to cut the expenses, like you said first, lot of clothes deals because 90% of travelers will go to clothes shop like Galleries Lafayette or Champs Elysées shops, but these travelers won't do the move to go to tech stores specially if the item is big or heavy. I will use your website sometime around Christmas as I will get a Geforce 1070 or a lens for my Fujifilm camera, also Christmas time is a period when lot of expats will come back from US and Europe :)