Nitrobetting 100% bonus for sports.
Nitrogen Sports isn't really popular anymore which is the primary reason why they renamed their site and are trying to improve its reputation. This is also why many gamblers don't recommend it anymore for sports betting in this forum.
And, signup/welcome bonuses would be worth it if it's a legit gambling site and not just to bait the new players and it's like to force you to bet or deposit to get the bonus.
It's difficult to actually win free money through the welcome bonuses in legit FIAT and crypto sports betting sites due to high wagering requirements etc. They are only worth it for site testing purposes.