>>3638645 (pb re: Beto Fundraising)
Looked up Beto on the FEC site. Because one of his top contributors was '2018 Senate Impact', I checked them out after looking at the who's who of Beto contributions. And yes, it looks like ActBlue is taking care of 2018 Senate Impact's fund raising efforts - ActBlue charges a fee for processing contributions.
From the FEC site:
https://www.fec.gov/data/receipts/?two_year_transaction_period=2018&data_type=processed&committee_id=C00501197&min_date=01%2F01%2F2017&max_date=10%2F28%2F2018
https://www.fec.gov/data/disbursements/?two_year_transaction_period=2018&data_type=processed&committee_id=C00660639&min_date=01%2F01%2F2017&max_date=10%2F28%2F2018