couple of weeks ago I ask allways the same question (see link below) with no reaktion. I have also contacted Jeffrey Friedl, but because auf time problems he is not able (or willing) to share or sell his solution.
If I had a wish free I would like to have an donation button which generates a paypal donation and uses the transaction-id as an licenece key. In first place it is stored in plug-in's database and additionaly it is stored on a server (for recovery/comparision purposes)
rgds - wilko
For payments and shopping cart, I use Paypal and the shopping-cart provider e-junkie.com. I don't know if this is the best solution, but I had already set it up for another unrelated activity so it was easy to use for my plugin activities.
I use Paypal micropayments ($0.05/transaction + 5%), which is better than the standard rate ($0.30/transaction + 2.9%) for transactions under $12.
I use the e-junk.com basic shopping cart, which is $5/month. I could have programmed my own minimal shopping-cart services (letting the user name a price, confirming the purchase, sending an email with the registration key) using Paypal's API, but I already had e-junkie.com set up for another activity, so it was much easier to use it.
Also, Digital River's SWREG service offers a license-key generation interface, but their transaction fees are higher.
(As I send previously, I haven't researched this in depth, so I have no idea if there are better on-the-cheap, little-programming options.)
- Is e-junk generating provable serial numbers?
- Are donations possible via e-junk?
With e-junkie.com, you have to provide your own license keys. You can set up donation pricing with a minimum and a suggested price -- the shopping cart starts with the suggested price and the buyer can change it.
I have to reset my brain ;-)
Both Swreg and e-junkie.com let you plug in your own license-key generator via URL you provide, and they also let you provide a file of thousands of pre-generated license keys, which they will mail out in the confirmation email.
Getting responses in forums is sometimes a bit like catching fish in a lake - sometimes they strike, sometimes they don't. Best to try again another day when no luck...
PS - I used to go looking for topics that seemed worthy but had no reaction. It was great fun because people were often grateful to get a response finally... However, the forum administrator reminded me of a forum policy against this, so I stopped. Anyway, you can always reply to your own post after a while to reposition to top of queue...