EPD treats their investors very well in that if you reinvest the dividends you end up with usually a 4% discount on the purchase of the stock which translates to about 8% annual return on that aspect of the investment
ETrade does not pocket the 4%. They and some others buy units in the open market and simply do not participate in the DRIP program. Suggest you call and discuss with them and if they do not agree to participate then move your account. There are about 20 other brokers who do not participate. ETP has a similar DRIP.