Free bonuses are issued as goodwill from the team of Betlion and are entirely based on activity. In case there is no activity on the account, or you have just received a free bonus, we would not be able to add another one until further activity. The Betlion team would sometimes decline a free bonus, due to no activity on the account.
The free bonuses are free bets (sports) or free spins on the Netent games.