Pluses
- An interesting payment method - online currencies, country-specific payment systems.
- A large existing user base.
- Selling Steam keys rather than hosting your own downloads. Means when I release a new version, it's no extra work for me.
Minuses
- Bundles - I'm not doing bundles for Airships before the final release. After that, yes, I'll be very interested.
- You're a payment processor rather than a store, which means I'd have to deal with nightmarish EU VAT rules.
Basically, if you have one of the pluses and none of the minuses, my answer is very likely to be yes please. :)