First, this is a few hours work and very URGENT. If you are already in some project then please don't bid.
I have a wordpress plugin ready to launch, however i am looking to add some kind of "lock" system to plugin.
Means if my buyer buy it and later asked for refund then i should be able to STOP his copy of plugin immediately.
I guess this can be done this way
1) Person buys plugin
2) We redirect him to some place where we can take his domain name and paypal transaction ID
3) Our plugin will make sure that if guy cancel his subscription then it should terminate the plugin immediately.
2nd Thing i need that whosoever install the plugin, it will show "powered by" my plugin name and a default hyperlink to my domain (which person should be able to edit)
3rd thing is that i should be able to display any kind of message in the "plugin" window in user;s wordpress blog so that i can offer them my other products.
HINT: my plugin use cron job
Please bid for these 2 addons
If you are expert i am sure you know this won't take much time just few piece of coding.