Registration promotions are very common. Generally, if you register and credit your account with a certain amount, then the website will match it or even give you twice the amount you deposit. This means that you could register with a website, add £10 to your account, and have £30 to play with.
There are many other types of promotion available too. Loyalty type schemes provide you with free bingo money when you credit your account on certain days while penny bingo games have become very popular indeed with gamers. There are some websites that offer free bingo cards on certain days as well as big money prize games that enable you and other players to compete for massive cash jackpots. Look for those online bingo sites that offer the best promotions if this is what you’re looking for when you play online.