I might not be the only one but suddenly it came in my mind that a few months ago on a saturday morning I received a message from casinoeuro regarding the weekend surprise free spins, they have added 20 free spins to my account because I made a deposit between monday and thursday. The spins were on a Push Gaming game, I open the game and saw the bet value was 10 cent per spin while the minimum bet on that game was 20 cent on a normal play. It is very misleading if you ask me, very tricky of them.
Same with Agent Spinner casino, they offered me 100 free spins (for only €10 ) on a game with 50 cent minimum bet on normal play but I found out that the bet value per free spin was 10 cent and they did not include this info in the email. I have played that particular game many times in the past and minimum bet was 50 cent but apparently they've made some modification to lure people and 'mislead' them to deposit. Nowadays I prefer deposit bonuses instead of free spins. You can't trust them anymore.