odds to chase?

[VLV]

Well you have 4 outs to a T (assuming the T of spades is clean). So using the rule of 4s you have approx 16% to hit your hand, which means you need to be getting 1:5.25 on your money. Which means that when the pot is $1.30 on the flop you can profitably put about 20c in. (Which is a bit wrong since you're only going to be putting money in if someone bets and thus you need to work out money for a pot that will be >$1.30).

However this is assuming that you will get to see both turn and river cards.

Someone correct me on the math I'm wrong, I was kind of actually just doing it for myself as well to see if I understand that stuff correctly.

Overall I think that the bets are so small, and since you believe you have implied odds, you can easily call these bets.