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Well, a good league to bet on but most of this team matches come with small odds because bookmakers are certain that this team has high chance of winning their matches. Portuguese league isn't competitive compare to premiership, serie A and others. Here, Porto, Sporting and Benfica dominate the league and have been rotating the league title for years.
Exactly

That's why I do a lot of parlays, because a few years ago I saw this pattern and decided to bet (literally) that the top 3 teams win the vast majority of games
It doesn't make much sense to bet on a simple 1 x 2 win, but parlays are a good deal here
Some matches are good for betting on +3 goals, but I'm still not very good at making those kinds of bets