Analyse both teams before you place your bet. Most of the time the win percentage on CS:GO lounge mean nothing, except for 80% or higher VS 20% or lower games.
Check out each player of both teams, you can find these on reddit most of the time:
www.reddit.com/r/csgobetting/
On there, nearly every game is posted and people share their opinion on both teams.
On each post there should be a little board about each player's stats.
There are a ton of people who analyse matches, look for them in the posts. They should give you some betting advise.
For example, a couple months ago there was a game going on between two random teams i've never even heard of. Turns out that one of the two random teams were planning to throw their game, and lounge didn't know of this. Turns out they indeed threw their game. Lucky me didn't place a bet. Instead i placed a bet on the 10% win percentage team with all my skins, and got about 100 euro back, because i knew they were going to win.
For the next NIP vs VP game:
Though, for this match it's hard to say. Both teams are nearly equal.
However, it is a B01. Anything can happen.
Personally I placed a small bet on VP.
Getting an 80 cents return if they win.
Hope I gave you a better insight on how betting works!