Crowdsourcing funds for lobbying is essentially what advocacy nonprofits do, like the Sierra Club, ACLU, EFF, Heritage Action, NRA, etc.
Edit to add: But lobbying is not bribery because lobbying money is never given to elected officials. Lobbying expenditures pay for things like salaries, research, events, mailers, ad campaigns, websites, etc.
etc. including but not limited to fundraisers and otherwise raising money for political campaigns, "awards" for championing a certain issue, and of course having a third party pay for meals or other personal perks.
Edit to add: But lobbying is not bribery because lobbying money is never given to elected officials. Lobbying expenditures pay for things like salaries, research, events, mailers, ad campaigns, websites, etc.