Ad-supported free widgets
There are few publishers that offer this already and usually they offer such widget as a Wordpress plugin for FREE.
Publisher and client split number of clicks on affiliate links or affiliate banners that are embedded next to each game shown inside such widget.
Example: 10 visitors click on a bookie A banner inside such widget so publisher gets 5 visitors signed under him and client gets 5 visitors signed under his affiliate account.
This way publisher gets paid for his widget as affiliate commission from bookies and can offer such widget for free to any client wanting to put his widget on his website.
Client in return gets quality widget without annoying ads or text at bottom of widget with link to publisher's website or having to have to pay for such widget.
For now I have yet to find quality and well designed widget doing what title already says.
We’ve tried something like this before but didn’t see enough revenue for it to make sense. It’s under consideration for the future though.
Remy Kongsvoll commented
I think the trial period was perfect, and testing in this period gave me enough to go for the paid version. Prices are low, so can't complain on that. If something should be free, it would be to attract users to use all widgets. So maybe League Table could be delivered in a free version, but without Badges, form and highlight team if you want more statsfc users..
Why not create such free widget for let say Euro 2016 soccer event then you'll see if this could work for you or at least offer such Euro 2016 free widget to draw new visitors to your commercialized widgets.
In a away you'd give 1 free widget that would only work during 1 month of Euro 2016 for people to test your widget on their websites and also for you to get more visitors and exposure.