This particular coupon is unlike any that iNetBet have used in their normal promotions. It is not actually a "bonus", but a "reward", in the same way that Cryptologic uses them. Unfortunately, RTG cannot properly handle this coupon type, and does NOT show the remaining WR tally as is shown for instant bonus coupons. This can look as though "nothing happened" when making the deposit with the code, and it is also very hard to keep track of WR, both the first stage to get the bonus, and the second to release it. It then becomes necessary to contact CS to get an update on wagering before risking a cash-out, something that is not necessary with the usual coupons that show either as "bonus" or "withdrawable".
The terms were indeed there, but if you didn't read them properly, and assumed these were "normal" coupons, then you might think there was a problem.
I played through a few of these, and indeed rounded off with that monster 90% on a $400 deposit (not really up to Virtual standards, THEY would have offered 900% on a $4000 deposit, and would find every excuse available not to pay anyone who had the nerve to meet WR).
One nasty catch, you DON'T get the bonus if you bust out before meeting the 20x on deposit, you have to deposit again to release the extra $360.
There may also be a bug, worth checking, as in my case it registered with a 30x playthrough of deposit, and I had to get CS to correct it (took a couple of Emails to find the problem & get it corrected).
In the end, a good result, thanks mainly to Enchanted Garden, $1000 in, and $1900 out, paid quickly as expected.
Their CS need to realise than players are going to be confused when they try different kinds of promotions, and a better explanation of the terms on the first reply would have prevented this slanging match.
There are a couple of other coupons of this nature, and remember, the $9 free chip has 5x max cashout ($45).