bux.to is not a scam , they have problems with payment system , so you need to wait ur requested payment about 1-5month. This is only luck , if you got payment in the first month , average is about 3months.
If U surf bux.to sites or such similar PTC sites, u will see that the majority of sites are not really from advertisers who pay to advertise in bux.to. How such sites manage to pay its members is it gets its main revenue from members upgrade, members buying referrals. And by having long 60 biz days to pay and U can only request payment once, meaning u can get paid only once every 60 biz days, so they will have positive cashflow for many mths before they encounter problems when they start paying their members.