Heck no! It is never a good idea to sell your customers more than they need, and it will only result in bad blood and lost business. A majority of web sites will be fine with the "basic" plan, though your expertise is important in making that distinction
There are much better ways to help your clients and increase revenue. Offer on-site training, suggest useful web features to help their business grow or offer monthly update services.
Developers found to be consistently signing up customers for a too-high plan may be removed from the program without refund.
