1. Bet365 - This international betting giant offers free rounds on selected slot games for new customers who sign up 📉 and make a deposit. They also offer regular promotions for existing customers that include free rounds.

2. 888sport - This popular 📉 betting platform offers free rounds on selected slot games as part of their welcome bonus for new customers. They also 📉 have a loyalty rewards program that offers free rounds and other perks for frequent players.

3. William Hill - This well-known 📉 betting house offers free rounds on selected slot games as part of their welcome bonus for new customers. They also 📉 have regular promotions for existing customers that include free rounds and other bonuses.

It's important to note that the availability of 📉 free rounds and other promotions can vary depending on the region and the specific terms and conditions of each betting 📉 platform. It's always a good idea to read the fine print and understand the wagering requirements before taking advantage of 📉 any promotions or bonuses.

In summary, there are many betting houses that offer free rounds as part of their welcome bonuses 📉 or loyalty rewards. Some of the most well-known betting platforms that offer free rounds include Bet365, 888sport, and William Hill. 📉 However, it's important to read the terms and conditions carefully and understand the wagering requirements before taking advantage of any 📉 promotions or bonuses.