Well in my opinion there are basically no hard and fast rules on what will work better than others as it really depends on so many variables and circumstances even though below are some basic draft text ads which in my opinion will have a better chance to attract more PSaS than the rest :
Remember the KISS principle that is keep it Simple and Short and SWEET and to the Point
Don't Over SELL and Over promise and No Hype
BE Sincere and Truthful
Remember that FREE is a powerful word but don't overuse it and use it the wrong way
Don't reinvent the wheels and make full use of all the available Sfi resources
Carpe Diem give them an incentive to sign up immediately and offer them either a TC Gift card or a ebook so that they can seize the opportunity and sign up and say that you are only looking for just 5 Partners dangle the Limited time and offer
With that in mind you tweak and test it out for yourself for what works for you in a certain classified section may not work at all in another keep tweaking and posting ads as it's a numbers game
Well in my opinion there are basically no hard and fast rules on what will work better than others as it really depends on so many variables and circumstances even though below are some basic draft text ads which in my opinion will have a better chance to attract more PSaS than the rest :
Remember the KISS principle that is keep it Simple and Short and SWEET and to the Point