Several of these guys come here from time to time to say they're making 50/60% more daily profit than the actual value. Just don't believe them and don't feed them. Whattomine gives you a rough estimate, you can get maybe a dollar more than what's showing there but not 50% more, ignore these clowns.
Such an increase is possible for a coin you already mined/are mining if it is the focus of a PnD group for that day or sth very good such as news of a big colloboration and/or listing in a major exchange.
Other than that I do not trust in paid miners.