contribute me a lot vs add me a lot

Some examples from the web:

• The EU can contribute a lot here.
• Choosing better-quality tyres will contribute a lot to reaching our CO2 targets.
• Choosing better-quality tyres will contribute a lot to reaching our CO2 targets.
• The report has done a lot to contribute to there having been particular awareness of this area in the EU, the Member States and the national parliaments.
• This Ethiopic cross illustrates Eglash has established: that Africa has a lot to contribute to computing and mathematics through their intuitive grasp of fractals.
• This Ethiopic cross illustrates Eglash has established: that Africa has a lot to contribute to computing and mathematics through their intuitive grasp of fractals.
• The Commission can contribute a lot to this debate, providing transparency in relation to what the different Member States do in a field which falls, and for the time being will continue to fall, within their competence.
• There is still severe underemployment among women with reference to the Lisbon Strategy target and many people with disabilities have a lot to contribute and a full role to play in the labour market.
• However, we voted against the amendments to the text as we see this as a crude instrument, too widely drawn, which would have no effect on the death penalty and could contribute to a lot of people losing their lives because of the illegal drug trade.
• Your father did contribute an awful lot to his campaign.
• I know a lot of people who would be glad to contribute.
• And there are a lot of things that contribute to that.
• Countries which contribute the most to the Community budget must know that they get a lot back in other areas, such as, for example, in increased exports to weaker Member States.
• Trucks and buses contribute to air pollution in ever greater proportions, as we have actually done a lot to reduce car emissions, for example by using better quality fuels and tax concessions, as Mrs Myller said.
• A lot of people are working to try and reduce that, but I didn't have anything to contribute.
• A lot more can and should be done, and the Commission will watch these developments closely and contribute in whatever way we can.
• In areas with a lot of businesses which use these chemicals, the discharge contributes to creating smog with its subsequent health problems.
• They must also contribute, because after all, they are the ones sitting on a lot of the information.
• But most importantly, I think, we really wanted to make an experience that was unlike the Johnny Cash Project, where you had a small group of people spending a lot of time to contribute something for everyone.
• It states that IWT, as a safe, environmentally friendly mode of transport with a lot of free capacity on its infrastructure, can contribute to modal shift and ease the congestion problems affecting other transport modes.

Some examples from the web:

• Add at least one file. Adding local files adds a lot of information automatically.
• You can add a lot of attachments to it, like a grenade launcher attachment.
• Using that woman was brilliant, it adds a lot of mystery to them.
• Start with fried onions, then you add a lot of bacon, tomato and cheese.
• I think you'd add a lot to the team, if you're interested.
• I cannot add a lot more to what I said in my original reply.
• They add a lot of improvisation to their shows.
• It certainly does not add a lot of quality to the work-life balance if people are too tired to read to their kids when they get home.
• Add corchorus and a lot of ginger.
• You could add on a lot of extra memory if you wanted to.
• This collection is not saved on exit of the application, so keep it in mind when you add lots of songs to it.
• Put 'em all together, it could add up to a lot of years.
• If each of those pikers comes through, it'd add up to a lot of money.
• Most of these are clerical and harmless, but it still adds up to a lot of near misses.
• And over time, they add up to a lot.
• And of course, the brain adds on a lot of information to what is going on in the signals that come from the retina.
• That'll add a lot to my prestige, won't it?
• That'll add a lot to my prestige, won't it?
• It's a really cool effect. I think it adds a lot to the story and it speeds up our filming.
• "With our presidency we will add a lot of Polish optimism, enthusiasm and energy: because we believe in Europe."