Current reward for burning 1 btc? Will this coin remain scarce?
The burn period is over.
Buy orders via centralised exchange (poloniex) is currently at 0.01BTC per XCP meaning 100 XCP for every 1BTC.
XCP has a fixed supply of no more than
2,648,756 XCP. This would not increase day to day, month to month or year to year, because there is no concept of proof-of-work mining to introduce fresh coins to the supply on regular intervals (and therefore inflate- Bitcoin would need approx 2.3 million $ of fresh income per 24hours in order to maintain it's current price level, XCP does not need to compensate miners ). This number could only ever decrease. (for example, with loss of private keypairs) so to answer your question, yes this coin has scarcity-value if that is what interests you.
The real excitement will come when we begin to see web wallets, dramatically lowering the barrier to entry. real use of decentralised aspects of exchange, for example an asset issuer taking advantage of this mechanism