Everybdy is on isabelmarco???

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I have been trying hard to get some referrals on isabelmarco as a referral exchange. i have wasted too many days in joining sites like thinkbux,vipbux,foxcash,earn.nu, in hope that i ll get a ref on isabel in exchange. but anybdy whom i ask for ref exchange says that "sorry i am already on isabel". So i m asking for the last time Is there anybdy under the sun who has still not joined isabel????? lol.; i think isabel is the best PTC,thats y everyone joins it first of all.