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A commission is paid if you open an account through one of these links, at no extra cost to you. It does not change any number the calculators produce, and it does not change the instrument data: contract specifications and swap rates are read from a live MetaTrader 5 account, not supplied by any of these companies.
Ranking on this page is not sold. Nobody here pays to be listed higher, and there is no arrangement to remove or soften anything unfavourable.
Trading CFDs and forex carries a high risk of losing your capital, and most retail accounts lose money. Check that a broker is regulated in a jurisdiction you are comfortable with, read the contract specification for the instruments you intend to trade, and never deposit money you cannot afford to lose. Prop firm challenges are a paid product with rules that are easy to fail — read them fully before paying a fee.