I've come across this type of format online from time to time. As a consequence of playing as many spots as possible, I found myself gravitating towards a no-bust strategy whenever there was only a handful of further rounds to be played and a big increase in BR was still needed. (i.e. just rely on the dealer bust to win every hand, rather than win a few hands and lose a few by busting.)
And if the betting limits did not allow me to go all-in at the outset, any safe double/split opportunities could be taken to get as many chips in play as possible.
I didn't come up with hard and fast rules about when to take this approach; it was all a bit ad hoc. and I possibly took it too far. As well as the number of rounds remaining and the required increase in BR, the number of basic strategy standing hands with stiff totals (or perhaps 17 or 18) was a major factor, my thinking being that you might as well stand on every 12-or -above if you need to win two or three stiff hands any way.