this is an idea, which might benefit people, but WILL be effort.
this is what it would look like:
Cashback website: XXXXXX YYYYYY ZZZZZZ Qco G.P.
dealer X% Y% Z%
currys 2% 4% 5% 3% 6%
dixons 8% 1% n/a 5% 3%
naturally, this would take a long time as there are LOADS of stores.
theres also the case of some stores offering different cashbacks for different things, in which case, you could click on the store, and there would be an expansion, rather than clogging the table.
You could also link the cashback websites and include a little background information on them, listing key things, such as Qco: £5 admin fee; G.P earn money for referals....etc.
you could possibly allow some trusted members to amend the table, so that the work isn't done by one or a few individuels, but isn't accessible to everyone who might fake some cashbacks or muck it up.
what is the point of doing this?
someone sees a deal, thinks, wonder how much cashback i could earn with that dealer.... then rather than looking at their favourite, they could look at the best.
For people posting deals: you could have an option "add cashback" and they could select the best, eg 6% with G.P.
what do you think? just a rough idea.