we play 4-7 people with $20 buyin and $20 in chips. pay 2 or 3 spots. blinds start at .50/1.00 and double with dropouts or set times. obviously M gets very small quickly. question: should all in bets be more frequent than value bets? if this is the case, then go in with top 20% hands pre-flop? what about calling all in bets?