How do you get tixs or robux without builders club on roblox

Well there is only 2 ways to get robux without builders club one witha credit card (can take awile) or if you goto trade currency it says what will you give ahhhhhhhhhhhhh joking that means you type in how many tixs you will give to the market and then say you put in 21 tixs it will say that you get 3 robux but if yyou submit your thing you will have 5 robux!