The site you recommend gives 10% to the RNC
Contributions to TNC from individuals (multicandidate PACs) will be allocated according to the following formula:
1. 90% to DJTFP, which will designate the funds first to its primary election account, then to its general election account, and finally to its recount account, up to a maximum of $3,300 ($5,000) per election; and
2. 10% to the RNC, up to a maximum of $413,000 ($150,000) per year.
Any contribution exceeding the legal amount that may be contributed to any committee will be distributed to the remaining participating committee to the extent permitted by federal law and according to the allocation method set forth above. Any contribution that would cause a contributor to exceed any applicable federal contribution limit or otherwise not be permissible under FECA and FEC regulations will be refunded to the contributor. Contributors may specify a different allocation than the one set forth above.
That is true of each approach, including WinRed.
However, not using WinRed means that WinRed can’t sell or give your information to all the other campaigns that want it.
ALL the PACS keep at least 10%.
THAT is how Judge Merchan’s daughter made her $$$$$.
Bundling for Biden & Hillary