I would change the promoción rather than the activación. For promotion sales drive/campaign.
For activación: stimulation

see examples:

Brian T Perry
... that increased sales; Supported and helped train team members with Windows
95 and Sales Activation software on new laptop computers being rolled out. ...
richweb.seas.smu.edu/Schools/Houston/Students/BPerry.htm

FIGURES "Business Process Model Implementation with CICS ...
... Pseudo-Code to Run a CICS BTS Process 1.3.4.2 26. Process SALES Activation with DFHINITIAL
1.3.5.1 27. Pseudo-Code for the SALES Process Root Activity 1.3.5.1 ...
publibz.boulder.ibm.com/cgi-bin/bookmgr

Best Telecom
... PIN Only Program Fund Raising Inactive Card Program Private Label Point Of Sales
Activation 11. Which Best Telecom Card are you interested in? $0.039 $0.049 ...
www.besttelecom.com/inquiry.htm

R & D
... big leap, one level higher, by diversifying the kinds of products through sales activation
of general medicines. From prescription to over-the-counter medicine ...
www.keunwha.co.kr/kw_eng/e_com07.html - 8k

R & D
... big leap, one level higher, by diversifying the kinds of products through sales activation
of general medicines. From prescription to over-the-counter medicine ...
www.keunwha.co.kr/kw_eng/e_com07.html - 8k

TelOne Telecommunications Contact Page
... Your pre-paid cards can feature: Domestic Origination, Point of Sales Activation,
Balance Updates and Reporting, Fraud Monitoring, Speed Dial Keys/Out-Dial ...
www.telone.net/pre-paid.htm - 4k

Shared Technologies Cellular Inc.
... is availble to members of the CellEase Universal Platform. These point of sales
activation (POSA) cards can be private-labeled by members and sold in their ...
www.sharedcellular.com/cellease.htm -

etc, etc,
Hope it helps