txtx4coins - Which API type do you prefer?

[Herbert]

I am working on http://txt4coins.net and asking myself what kind of API you would prefer.
Basically there are two options:

Pay-per-use:

• no registration required
• no pre-payment necessary
• you only pay what you really need
• requires more complex logic on your side as you always need 2 steps: Submit message, pay message
• no risk on your side in case site is shut down as there is no pre-payment
• no way to implement a volume discount

Prepaid:

• Registration required
• You need to charge your account before you can send a message
• Simple logic on your side - Only one step necessary to send a message
• possibility of volume discounts
• risk on your side to get your prepaid coins back in case site is shut down

Currently implemented is the pay-per-use approach as I think it fits the bitcoin-model best. (Check out http://txt4coins.net/betatest/api/ for an API description). However it means a more complex workflow for anybody using it due to the 2-step approach, so for easy adoption the old-school prepaid method would be better?

[MaxSan]

pay-per use is the only sensible way to go in my eyes.

Would you consider a type of business rates for individuals who wanted pay for mobile services via text? (eg. bulk)

[Herbert]

pay-per use is the only sensible way to go in my eyes.

Would you consider a type of business rates for individuals who wanted pay for mobile services via text? (eg. bulk)

Yeah, this is also my personal opinion.
I am currently working on a bulk message implementation so you can send the same message to an arbitrary amount of recipients. In this scenario a volume discount should be possible. But i think this is not what you meant?