which PTC is scam?

hello dear, you have a good question and if you really look into mylot discussions it seem that various sites you have mentioned are joined by mylotters and I have heard lot about, specially, neobux. Some senior mylotters vouch for neobux. So that could be a good site to try. Well if you follow my advice just go through the various point of views in the related discussions and you might have your some doubts cleared. thank you.