Providing proof of payment is important but you need to understand that those platforms cannot make you any reasonable money. I have ventured into similar platforms before but at the end of the day I was not able to make even a single dollar. Any website that cannot give me up to a dollar a day is not worth my time at all especially if it is time wasting.Interesting site that you shared here, I must commend you for that, but please you forget to include your proof of payment, do well to post it so we will have no difficulty registering in the site, and with the proof of payment we are sure to make some money from the app.