Casino Whoring; Risk of ruin question

Hi,

I recently started to whore casinos in addition to my poker game, since it appeared risk free.

The casino I have tried is Littlewoods (and I plan on doing Interpoker's casino site).

Now, I cleard the £500 WR for the £25 bonus with 250 x £2 bets, but I wonder if any of you casino whores out there use a different strategy when clearing the WR. For example, using £5 bets I'm only required to play 100 bets but my risk of ruin increases (I guess).

So in short -- what can be considered a "good" risk of ruin / # bets required ratio?


Did this question make sens?

Best,

Ralf

PS. Are there any more "risk free" casinos out there? DS.