I rarely do the extra bets. There is only a handful of slots I do them on. Mostly ones that does not cost more than 50% the stake.
I will never do it on slots that it costs 100% X the stake or more.
I just do not see the point especially because being in the UK we have no bonus buys anyway so we are used to just playing the slots naturally. Also some slots from some providers depending on what casino you play at in the UK enable extra bets where some do not. So it is hit or miss most of the time. It is very strange honestly. Take for example
All British. They have slots with extra bets enabled on some providers but yet on others they do not have it enabled? No idea why they choose to enable it on some but not others? Did they just forget to enable it? No clue.
Like Hacksaw now has an option for UK to be able to pay for the extra bet but I only found that extra bet on hacksaw slots in a few casinos. Majority do not allow it on hacksaw. Same for Elk they also added it so we can now do the bonus hunts. But again this is again limited to newer slots and or casino you play at. But again Elk bonus hunt extra bet is 200% the stake so that is a no from me anyway.