Hello there!
Being primarily an e4 player, I try to alternate with 1.c4 without embarking on too much d4 theory, and in this respect 1.c4 e6 proves rather challenging. 
After 1.c4 e6 2.Nc3 d5 3.d4 c5 4.cd ed, I saw a weird idea in an online encyclopedia : 5.e4 intending 5...dxe4 6.Bc4 cxd4 7.Qb3 (see diagram).
 

After a natural move like 7...Qd7 8.Nxe4, Black seems to have a problem with his black bishop, especially since the plan of ...a5-Bb4 runs into a timely Bxf7+ followed by Ne4-d6+. However in the diagram position I'm more concerned with 7...Nf6, letting go of f7 but retaining the central pawns. Do you feel White retains enough compensation here? I fear this whole idea of 5.e4 may just be crap, and would like to learn more from you guys.