Last month Luxury Escapes updated their terms to limit the use of gift cards purchased from elsewhere:
The maximum redemption value for Gift Cards not purchased directly through the Website is limited to $1,500 per order.
Wondering if anyone has tried to use the vouchers since the policy changed on 23 June? Is there a way of getting around it?
Extremely disappointing that they introduced this and am so lucky I noticed before purchasing 4K in unusable vouchers for my next booking.

Thanks OP, did not realise this had changed, that's a big deal, have done thousands in a booking before. Would have been caught next time had you not mentioned this.