Avoid bet types which significantly decrease RTP
The majority of online slots have the same RTP for all kinds of bets. However, some slots derived from land-based slot games add significant disadvantage to certain bets. In this case should always choose the bet type without the disadvantage. I will use two examples to demonstrate his fact. Example bet on all 3 winlines costs 2 cents and bet on 1 winline costs 1 cent. It is quite obvious that bet on 1 line has a huge disadvantage and its RTP will be extremely low. Therefore, it is always beneficial to choose the bet of 2 cents.