Let me kick-start this contest with a simple but hard-to-get screenshot: Pimped - 136.66x (Wikiluck) (Note: Wikiluck has got no game logs or proper bet history - terrible!)

I agree with @loceff13 that playing with Bonus Buys certainly need a big bankroll and is not recommended for most low budget players. I have tried playing with Bonus Buys on many various games (fun mode of course) and most of them were and are horribly money-hungry! Big spenders are attracted to this kind of play simply because there's always a chance of getting that max win quickly and easily, despite having to spend and possibly lose a truck full of cash!

*** CONTEST CLOSED ***

Unofficial Final Leaderboard 1st @Daneski 576.7x 300 EUR 2nd @loceff13 574.2x 250 EUR 3rd @Blackjax 457.8x 200 EUR 4th @marius1978 455.5x 150 EUR 5th @formerPokerpro 425.6x 100 EUR _____________________________________ 6th @kuff 229x 7th @Maiwen 206.35x 8th @Flatzem888 155.6x 9th @Afi4wins 134.6x AC: Congrats to all in this Braggmatic Play Comp! Oh....I mean BRAGG comp! Special congrats to Daneski for 1st place by 2.5x!  Will need the "moderator" to notarize the final leaderboard! 

I'm not a fan of allowing bonusbuys for bigwin leaderboard comps, it only favours the people with big bankrolls who can risk the volatility of buying a hundred bonuses etc. Having a no buy rule means you have to actually spin the slots and be aware of whats going on, it also means someone with 200eur with a deposit bonus) has a similar amount of playing power as someone with 2000eur if playing 0.1eur spins etc. More more level playing field.