Oh forgot to add
The higher your balance the better the chance
Use this site

https://dicesites.com/tools

Calculate how many rolls your balance can take on a different setting

Try different strategies youtube are full of them

If you want to deposit to the site do it mainly for the interest not for the game
And I always recommend starting with 1 sat as your base bet

Martingale is one and the Fibonacci sequence is very interesting and very old betting techniques will cover your losses

Ok I have been playing with freebitco.ie for a while.
When playing multiply it is a gambling game and the chances are house will win, the odds are 5%. But I have learned so much form the experience.
So I am not expecting to become rich or have an income from the site but let's say the pros and cons.
Pros
1 it is legit
2 free BTC every hour and the amount increases the more you use the site.
3 reward point
4 bonuses when you play multiply
5 interest earned on BTC in the wallet
6 lottery

And the cons
All I see is the 5% risk of losing

My strategies
Collect hourly BTC
On auto
Setting
Base bet 1 sat
Odds 3
Number of rolls 21212121
Take profit at 100 sats
On winning return to base
On losing increase by 75%

I have only lost a few times with this more wins than losses

On manual bet
Base bet 100 ods 1.3

Play until you lost 100 sats

Then use the auto bet settings to cover your loss

Alternate between both gives you a steady increase in your balance with less risk

But remember be greedy and you will risk everything